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How to Perform Public Records, OSINT, and Online Research
Most people can search. Far fewer can research well. The difference is not how many websites you visit. The difference is whether you understand what each source is actually good for, what it is weak for, how to use it correctly, what value it can add to your research, and how to verify what you found before treating it like fact.
Washington State Investigators built this page as a practical, investigator-grade guide focused on performing research with step-by-step instructions. This page is designed to help visitors do real research work, not just browse a list of tools. Each section explains what a source category is good for, which tools fit that category, how to use them, what useful results often look like, what weak results often look like, and what next step usually makes sense.
If you want the broader, directory-style page that organizes official agencies, public-record access points, reporting channels, legal-help resources, and investigative tools into one reference hub, use the Private Investigative Resources page.
Important notice: This page is educational information only. It is not legal advice. Public-record availability, privacy rules, consumer-data limitations, indexing practices, court-use rules, and site visibility settings all matter. Finding information is not the same thing as verifying facts.
Table of Contents
- How to Use This Page
- Before You Start
- Research Method: Work Like a Real Investigator
- Search Engines and Search Operators
- People-Search and Data-Broker Websites
- Public Records and Government Research
- Property, Recorder, and Parcel Research
- Social Media Research
- Username and Account-Discovery Tools
- Email, Breach, and Contact Research
- Business, Entity, and Financial Research
- Website, Domain, and Technical Footprint Research
- Flight Tracking and Airport Arrival / Departure Research
- Historical, Family, Cemetery, and Archive Research
- How to Verify What You Find
- Common Research Mistakes
- Master Resource List
- Frequently Asked Questions
- Confidential Review
Third-party tools/resources disclaimer: Many tools linked on this page are third-party websites not owned, controlled, or maintained by Washington State Investigators. Third-party databases may be incomplete, outdated, paywalled, geo-limited, or wrong. Search results should be treated as leads only unless verified through official records, chronology, source comparison, and context.
How to Use This Page
This page is organized by research task, not by random link type. If you need a person’s address history, start with People-Search and Data-Broker Websites. If you need court, business, or licensing information, go to Public Records and Government Research. If the issue involves deeds, parcel numbers, ownership clues, or mailing addresses, go to Property, Recorder, and Parcel Research. If you are working from usernames, handles, or public profiles, go to Social Media Research and Username and Account-Discovery Tools. If the issue involves email addresses, breach exposure, or company contact patterns, go to Email, Breach, and Contact Research. If it involves companies, officers, or public filings, go to Business, Entity, and Financial Research. If it involves websites, domains, old webpages, or technical footprint, go to Website, Domain, and Technical Footprint Research. If it involves travel timing, airport arrivals, route plausibility, or likely flights, go to Flight Tracking and Airport Arrival / Departure Research. If it involves deceased relatives, maiden names, family lines, older Washington records, or local archive work, go to Historical, Family, Cemetery, and Archive Research.
Each section follows the same layout so the page is easier to use under pressure: what the section is good for, what it is weak for, which tools fit that section, how to use them step by step, what useful results often look like, what weak results often look like, and what next step usually makes sense. If you are new to research, start with Before You Start and Research Method: Work Like a Real Investigator before jumping into the tools.
If you want the companion page that organizes official Washington agencies, reporting channels, legal-help resources, and broader investigative directories into one reference hub, use the Private Investigative Resources page.
Before You Start
Strong research begins before the first search. The best results usually come from clearly defining the objective, separating confirmed facts from assumptions, and selecting the right source type for the next question.
What this section is good for
This section helps you avoid the most common early mistakes: searching too broadly, relying on one source, and confusing a lead with a verified fact.
Start with these questions
Who or what am I trying to identify, verify, locate, or narrow?
What do I already know for sure?
What do I only suspect?
What record type is most likely to answer the next question?
Write down your starting identifiers
Full legal name
Middle name or middle initial
Aliases, nicknames, or prior surnames
Approximate age or date of birth
City, county, and state
Known address or prior address
Phone number or email address
Username or handle
Business name or trade name
Known relatives, spouse, associates, or household members
What creates research value right away
Knowing whether you are trying to identify, verify, or locate
Knowing what source category should come first
Knowing which details are confirmed and which are only possible
Knowing that repeated identifiers matter more than one isolated hit
Research rule: A match is not the same thing as a verified match.
Research Method: Work Like a Real Investigator
Professional-quality research is not one big search. It is a sequence. Each step should either confirm, narrow, or challenge the last step.
What this section is good for
This section gives readers a repeatable workflow so they can stop jumping randomly from one website to another and start building a defensible fact pattern.
Start with the strongest identifier. Exact name plus city, full address, business name plus state, exact email, or exact username usually works better than broad guessing.
Check official sources first. Government, court, tax, licensing, parcel, recorder, and archive sources are often better starting points than commercial databases.
Use commercial and OSINT tools second. These are often best for developing leads, finding repeated identifiers, and discovering related clues.
Build a timeline. A record is far more useful when you know when it appears and whether it fits the rest of the story.
Track repeated identifiers. Repeated addresses, repeated phones, repeated relatives, repeated usernames, repeated officers, and repeated domains often matter more than one isolated hit.
Verify before you conclude. A useful result is not automatically a true result.
What experienced researchers do differently
They compare quiet records, not just flashy results.
They care about dates and source weight.
They separate lead development from final verification.
They document why a match does or does not fit.
Where people go wrong
They assume a people-search result is current
They assume a court result belongs to the right person
They assume a business link is still active because it appears online
They skip the step of searching repeated identifiers separately
Core rule: Research is not about finding the most information. It is about reducing uncertainty by verifying what matters.
Search Engines and Search Operators
Search engines are still essential because they help surface scattered references across websites, PDFs, directories, public posts, archived content, court mentions, and business pages. They are discovery tools, not final-proof tools.
What this section is good for
Use this section when you need to discover footprint, locate public mentions, identify related websites, search one platform more efficiently, or test name and address combinations quickly.
What this section is weak for
Search engines are weak when you need certainty by themselves. Search-engine results often reflect indexing behavior, popularity, SEO, and cached public content, not final truth.
Resources in alphabetical order
Bing
Good for: alternate indexing, image-search differences, and finding results Google may rank differently.
How to use it: Search the exact full name in quotes first. Then rerun with city, state, spouse, employer, business name, address, phone, or username added. Run the same query you used in Google and compare the differences instead of assuming one engine is enough.
What useful results look like: Repeated identifiers that also appear elsewhere, such as the same city, employer, phone, domain, or address.
What weak results look like: Common-name clutter, directory spam, or results that only repeat the same low-quality data-broker content.
Best next step: Pull out repeated identifiers and search those separately in official records or stronger source categories.
Good for: broad discovery, PDF discovery, public-profile discovery, brand mentions, and site-specific searching.
How to use it: Start with an exact-phrase search, then use operators like site:, quotes, OR, and minus terms to narrow noise. Search the same person with multiple anchors, such as city, employer, spouse, address, username, email domain, and business name.
What useful results look like: Public PDFs, archived mentions, company pages, social profiles, local references, or government pages that fit the known geography and timeline.
What weak results look like: SEO junk, content farms, low-value directories, or one repeated claim copied across many weak sites.
Best next step: Follow the strongest repeated lead into court, business, property, archive, social-media, or domain research.
High-value search examples
"John A Smith" Seattle"John A Smith" "ABC Roofing""123 Main St" "John A Smith"site:facebook.com "John A Smith" Tacomasite:linkedin.com/in/ "John A Smith""John A Smith" filetype:pdf
Reader value note
Search engines are often where the first contradiction appears. A people-search site may say one thing, but a court docket, archived website, wedding page, obituary, campaign filing, or public PDF may point in a different direction. That is exactly why search engines still matter.
People-Search and Data-Broker Websites
People-search websites are popular because they are fast and easy, but that convenience creates risk. They often blend old data, wrong-person matches, stale phones, historical households, and incomplete relatives into results that look more certain than they really are.
What this section is good for
Use this category to generate leads, identify address history, find likely relatives, surface phone and email clues, and decide which official record source to search next.
What this section is weak for
This category is weak for final conclusions. These tools are best for lead development, not proof.
Best workflow before using these sites
Write down the exact name, state, and approximate age first.
Search one site at a time instead of assuming all results agree.
Track only repeated addresses, repeated relatives, repeated phones, and repeated city patterns.
Move those repeated items into assessor, recorder, court, business, and general search-engine research.
Resources in alphabetical order
AnyWho
Good for: quick directory-style phone and person lookups.
How to use it: Search by exact name and state or by exact phone number. Use it early as a low-friction lead generator, not as the end of the research.
What useful results look like: A phone or city clue that fits the rest of your identifiers.
What weak results look like: Very thin records, broad name clutter, or records with no usable supporting identifiers.
Best next step: Cross-check the phone or address elsewhere.
BeenVerified
Good for: broad consumer-profile snapshots, address history, possible relatives, and contact clues.
How to use it: Search the exact name and geography first. Compare promising addresses and relatives to other sources before relying on them. Keep notes on what repeats rather than copying everything out.
What useful results look like: A clear household pattern, repeated addresses, and relatives that fit age and geography.
What weak results look like: Long lists with little timeline control or relatives that do not fit the age and geography pattern.
Best next step: Move repeated addresses into property and court research.
FastPeopleSearch
Good for: free address and phone lead development.
How to use it: Search by full name and state first, then review repeated addresses, relatives, and age-range clues. Use the site’s phone and address search functions when you already have those identifiers.
What useful results look like: One or two addresses that repeat and a household pattern that looks coherent.
What weak results look like: Large mixed profiles with too many addresses or no clear age fit.
Best next step: Verify the best address and mailing clues in assessor or recorder tools.
Intelius
Good for: older address-history leads, phone clues, and broader paid consumer-data aggregation.
How to use it: Use the result to build a working list of names, cities, and past addresses, then verify those leads through assessor, court, and business sources.
What useful results look like: Older addresses or location history that explain why a subject appears in a county or city later.
What weak results look like: Overmerged profiles, especially with common names.
Best next step: Search the older addresses and relatives separately.
Melissa Lookups
Good for: address formatting, name, email, and person-related lead development depending on the lookup used.
How to use it: Run one identifier at a time and save only the repeated or cross-supported results. Use it more as a quality-control tool than a final-answer tool.
What useful results look like: Cleaned-up addresses or identifiers you can reuse elsewhere with better precision.
What weak results look like: Thin data with no supporting context.
Best next step: Reuse the cleaned-up identifier in official records.
That’s Them
Good for: alternate people, address, email, and phone lead development.
How to use it: Use exact identifiers where possible. Compare hits against the same subject in at least one other people-search site.
What useful results look like: An alternate address or email clue that repeats in another source.
What weak results look like: Thin entries with no overlapping identifiers.
Best next step: Search the repeated phone, email, or address independently.
TruePeopleSearch
Good for: free address and household lead development.
How to use it: Search the exact name and review historical addresses, age, and relatives. Cross-check anything useful somewhere else.
What useful results look like: A fast household picture that helps explain next steps.
What weak results look like: Too many household ties with no clear age or geography fit.
Best next step: Verify the most repeated address first, not the most recent-looking one.
TruthFinder
Good for: broad consumer-data summaries and lead generation.
How to use it: Use it to develop hypotheses, not to finalize them. Pull out addresses, relatives, and location clues, then verify with official sources.
What useful results look like: Clear concrete identifiers you can independently test.
What weak results look like: Large narrative-style output with little clear source weight.
Best next step: Strip it down to concrete identifiers and verify those only.
Whitepages
Good for: phone, address, and quick person-to-location lead development.
How to use it: Search by exact name, city, or phone number, then compare any results to other directories or official records.
What useful results look like: A phone, city, or address pairing that repeats elsewhere.
What weak results look like: Broad commercial upsell pages or results with no meaningful supporting identifiers.
Best next step: Use the phone or address in another category.
Best-practice workflow for this category
Run the exact full name plus state first.
Track every repeated address.
Track every repeated relative or household member.
Track every repeated phone number and email clue.
Verify the strongest leads in assessor, recorder, court, DOR, SOS, and general search-engine results.
Public Records and Government Research
Official public records are usually where research becomes stronger. These sources are often less convenient than commercial sites, but they generally provide higher-value evidence and better timeline control.
What this section is good for
Use this category when you need business status, licensing, court footprint, trade names, recorded legal history, regulated occupation information, and government-origin data.
What this section is weak for
Official public records are often weak when the researcher starts in the wrong county, wrong state, wrong court level, or wrong agency. The record may exist, but not in the place you first guessed.
DOR comes before SOS because it often surfaces practical licensing and trade-name clues first
Washington Department of Licensing Professional Licenses
Washington Department of Licensing Professional Licenses
Good for: professional and occupational license overview pages.
How to use it: Start here when you know the profession but need the correct Washington licensing path first. Identify the correct license type before doing person-specific searches elsewhere.
What useful results look like: A clear path to the right licensing lookup system.
What weak results look like: General profession pages without direct person-specific confirmation.
Best next step: Move into the direct professional lookup tool.
Washington Department of Revenue Business Lookup
Washington Department of Revenue Business Lookup
Good for: business-license lookup, UBI-linked business clues, trade names, and operational status leads.
How to use it: Search the exact business name first, then shortened names and trade names. Review the results for active status clues, addresses, and any associated business-identity information. Search the owner or officer names if they appear.
What useful results look like: A business name, trade name, and address pattern that fits the rest of the case.
What weak results look like: Common-name businesses with no location anchor or no address clue that fits your subject.
Best next step: Compare the result to SOS, website, and property records.
Washington Professional License Lookup
Washington Professional License Lookup
Good for: regulated occupations, licensed professionals, and credential status.
How to use it: Search by exact person or business name, compare license dates and status, and then compare the result to other records and the subject timeline.
What useful results look like: A status, date, and name combination that fits the profession and time period you are testing.
What weak results look like: Similar names with no geography or date fit.
Best next step: Search the business or person in DOR, SOS, and general web research.
Washington Secretary of State Corporations and Charities Filing System
Washington Secretary of State Corporations and Charities Filing System
Good for: formal entity records, governors or officers, registered agents, filing history, and formation dates.
How to use it: Search exact business name first, then abbreviations and key terms. Write down officers, addresses, registered agents, and filing dates. Search each repeated name or address separately.
What useful results look like: An entity record with names and addresses that connect to the subject elsewhere.
What weak results look like: Common entity names with no address or officer tie to your subject.
Best next step: Search the officer names, registered agents, and addresses in other categories.
Washington Courts Name and Case Search
Washington Courts Name and Case Search
Good for: court-footprint discovery tied to names, cases, counties, and filing history.
How to use it: Search the exact name, then name variations. Compare county, dates, court level, parties, and chronology before deciding the hit belongs to your subject.
What useful results look like: A case footprint in the right county and approximate time period, with parties or facts that fit.
What weak results look like: Common-name hits with no supporting address, age, or county fit.
Best next step: Move to the local court or clerk source if the case appears promising.
Washington Courts Person Search
Washington Courts Person Search
Good for: narrowing by person rather than only by case title.
How to use it: Use exact names first. Compare court, county, and any available identifiers. Treat common names carefully.
What useful results look like: A person entry that matches the court, county, and timeframe you already expect.
What weak results look like: Name-only matches with no other usable narrowing information.
Best next step: Cross-check the county and timeline elsewhere before relying on it.
Research value tip: DOR and SOS together are stronger than either one alone. DOR often helps with real-world operating or licensing clues, while SOS often helps with formal entity structure and officer history.
If you need the broader page that groups official court resources, reporting channels, legal-help paths, and Washington public-resource directories in one place, use the Private Investigative Resources page.
Property, Recorder, and Parcel Research
Property research is one of the most useful categories in investigative work because addresses, parcels, mailing addresses, ownership names, trusts, and recorded documents frequently overlap with other parts of the subject’s life.
What this section is good for
Use this category to confirm ownership indicators, identify mailing-address differences, locate parcel numbers, review recorded documents, and connect people, entities, and properties through repeated address patterns.
What this section is weak for
Property records are weak if you assume the mailing address always equals residency, or if you treat a parcel hit as proof of current control without checking dates and document history.
Resources in alphabetical order
King County Assessor
Good for: ownership and valuation research.
How to use it: Start by address or owner name. Record parcel number, situs address, owner format, and mailing address.
What useful results look like: A parcel record whose owner name, situs, and mailing address fit the broader case facts.
What weak results look like: Common owner names with no parcel or address fit.
Best next step: Move the parcel and owner name into recorder research.
King County eReal Property
Good for: parcel-level property detail.
How to use it: Search by address or owner and compare the mailing address to the rest of your research.
What useful results look like: A parcel record with consistent situs, owner formatting, and tax detail.
What weak results look like: Partial address uncertainty or common owner-name confusion.
Best next step: Search the parcel or legal parties in recorder records.
King County Recorder Search
Good for: deeds, liens, assignments, releases, and recorded legal documents.
How to use it: Search exact names, trust names, and entity names. Track grantor, grantee, dates, document type, and legal description.
What useful results look like: A recorded document that ties the right parties to the right parcel and time period.
What weak results look like: Name-only hits with no matching property or time fit.
Best next step: Compare the document parties and dates to assessor and business records.
Pierce County Assessor-Treasurer
Pierce County Assessor-Treasurer
Good for: parcel, tax, and ownership lead development.
How to use it: Search by address, owner name, or parcel and compare mailing data to the rest of your timeline.
What useful results look like: Ownership style, mailing differences, and parcel anchors that tie back to the subject.
What weak results look like: Common owner names with no location certainty.
Best next step: Search the parcel and mailing address elsewhere.
Pierce County Parcel Search
Good for: parcel-specific research.
How to use it: Use it to isolate parcel numbers, situs addresses, and owner formatting for follow-up recorder or tax research.
What useful results look like: One parcel that cleanly matches the address or owner trail.
What weak results look like: Broad search terms that return too many parcels.
Best next step: Use the parcel as your primary identifier in the next source.
Snohomish County Assessor
Good for: ownership and property-tax lead development.
How to use it: Search by owner, parcel, or address and compare the mailing address to business or people-search results.
What useful results look like: A property record that reinforces the subject’s geographic pattern.
What weak results look like: Similar names with no parcel or city support.
Best next step: Cross-check the owner and mailing address elsewhere.
Snohomish County Property Tax Search
Snohomish County Property Tax Search
Good for: tax and parcel research.
How to use it: Use parcel or address to confirm tax-related property details and ownership clues.
What useful results look like: A parcel and tax trail that fits the subject’s address and timeline.
What weak results look like: Limited detail when the wrong parcel is selected.
Best next step: Move back to assessor or recorder with the better parcel anchor.
How to get more value from property research
Compare situs address to mailing address.
Search the owner name exactly as formatted in the record.
Search trust names and LLC names separately.
Use parcel numbers in recorder and mapping research.
Track repeated mailing addresses across multiple properties or entities.
Social Media Research
Social media is rarely strongest as standalone proof. Its real value is timeline development, identity confirmation, relationship clues, employer clues, travel context, business promotion, lifestyle indicators, and preservation of public-facing content before it changes.
What this section is good for
Use this category to identify public profiles, compare names and usernames, track timeline events, locate linked businesses or websites, and gather contextual clues around where a person appears and how they present themselves publicly.
What this section is weak for
It is weak when the researcher assumes that one matching photo, one city mention, or one handle automatically proves identity.
Resources in alphabetical order
Good for: public profiles, business pages, comments, group clues, public photos, and visible relationship context.
How to use it: Search with Google or Bing using site:facebook.com and the exact name, city, employer, or business name. Save usernames, profile URLs, public page names, and visible city or employer clues.
What useful results look like: A profile or page with matching geography, repeated associates, business names, or timeline markers.
What weak results look like: Common-name profiles with no supporting location, relative, or timeline fit.
Best next step: Search the repeated username, relatives, and linked websites elsewhere.
Good for: username discovery, visible bio text, linked websites, and public visual timeline clues.
How to use it: Search exact handle if known. If not, use search engines with site:instagram.com and name variations. Record usernames, bios, linked sites, and repeated locations.
What useful results look like: A handle, bio, or linked site that matches other known identifiers.
What weak results look like: Similar-looking profiles with no geography, bio, or external-link support.
Best next step: Search the handle, linked website, and business name elsewhere.
Good for: job history, employer names, education claims, professional role claims, and business connections.
How to use it: Search exact name plus site:linkedin.com/in/. Compare employer, city, and timeline to the rest of your research. Search former employers and business names separately.
What useful results look like: A professional timeline that fits the subject’s geography and dates.
What weak results look like: Same-name profiles with no employer or city match.
Best next step: Search the employer in SOS, DOR, OpenCorporates, and general web research.
X
Good for: public posts, handle discovery, public statements, linked websites, and timeline anchors.
How to use it: Search exact handle if known, or use site:x.com and site:twitter.com with the full name or username.
What useful results look like: A public post trail, handle, or linked site that supports the broader timeline.
What weak results look like: Same-handle or same-name confusion with no supporting context.
Best next step: Search the linked websites, usernames, and dates elsewhere.
What creates value in social-media research
Saving context, not only screenshots
Recording URLs, handles, and dates observed
Comparing public posts to travel, work, property, or court timelines
Following linked websites, business names, and usernames into other record systems
Username and Account-Discovery Tools
Usernames are often stronger than names because they can be more unique and more reusable across platforms. A repeated handle across sites can help connect accounts that a legal-name search misses entirely.
What this section is good for
Use this category when your strongest lead is a handle, gamertag, alias, or repeated username instead of a verified legal name.
What this section is weak for
It is weak when the researcher treats a username match as proof without comparing the profile image, location, linked websites, timeline, or other identity clues.
Resources in alphabetical order
IntelTechniques Tools
Good for: category-based OSINT searching across names, usernames, telephone numbers, addresses, email addresses, domains, maps, business and government searches, and more.
How to use it: Start with the category matching your strongest identifier, then pivot only after you have a meaningful lead. Do not bounce through every category at once.
What useful results look like: One or two strong cross-platform clues, not dozens of weak possibilities.
What weak results look like: Too many weak hits created by running vague inputs across too many categories.
Best next step: Pull only the strongest repeated identifier and move to the next best source category.
OSINT Framework
Good for: browsing OSINT categories and locating free or partially free OSINT tools by use case.
How to use it: Use it when you know the type of problem you are working on but not yet which tool type fits best. Browse by category rather than randomly clicking tools.
What useful results look like: One tool category that clearly fits your exact research task.
What weak results look like: Tool overload and drift because too many tools are opened without a defined question.
Best next step: Select one tool category that matches the exact research task.
Sherlock
Good for: username checks across many sites.
How to use it: Use the exact handle first. Treat matches as leads and confirm them manually by opening public pages and comparing visible identifiers.
What useful results look like: Public profiles that share the same handle plus similar photos, bios, or linked sites.
What weak results look like: Raw handle matches with no evidence they belong to the same person.
Best next step: Manually review the public profiles that look strongest.
WhatsMyName
Good for: broad username availability and platform-presence testing.
How to use it: Run exact usernames, then compare profile images, bios, cities, and linked websites before assuming identity.
What useful results look like: A handle appearing on several platforms with supporting identity clues.
What weak results look like: Placeholder, empty, or unrelated accounts using the same or similar handle.
Best next step: Search the strongest matching platform profile manually.
Email, Breach, and Contact Research
Email addresses can be extremely valuable because they are often more unique than names and more stable than usernames. One email can connect business filings, social platforms, newsletters, domains, and breach-related exposure clues.
What this section is good for
Use this category when an email or phone number is your strongest identifier and you need to connect that identifier to broader footprint clues.
What this section is weak for
It is weak when researchers overstate what breach data or contact-pattern data proves. Context matters.
Resources in alphabetical order
Epieos
Good for: email- and phone-based lead development.
How to use it: Run exact identifiers and save only the results that point toward verifiable public profiles, usernames, or domain clues.
What useful results look like: Results that bridge the email or phone to a public-facing account, profile, or domain pattern.
What weak results look like: Thin outputs with no bridge to a public profile or other independent source.
Best next step: Search the linked usernames, public profiles, or domains elsewhere.
Have I Been Pwned
Good for: breach-exposure checks tied to exact email addresses.
How to use it: Use exact email only. Treat breach appearance as contextual information, not character evidence. The real value is whether it helps confirm the email has been in circulation or associated with public or semi-public digital use over time.
What useful results look like: A breach history that shows the email is real and longstanding enough to matter.
What weak results look like: No result, which does not prove the email is fake or inactive.
Best next step: Use the exact email in domain, business, and search-engine research.
Hunter
Good for: domain-based email pattern discovery and business-contact lead development.
How to use it: Use it when you already know the company domain and want to test email-pattern plausibility or locate likely public-facing contact structures.
What useful results look like: A domain pattern that plausibly supports the person or role you are testing.
What weak results look like: Broad company-level outputs that do not yet tie to the subject.
Best next step: Search the discovered emails, domain, and associated company elsewhere.
Business, Entity, and Financial Research
Business research becomes powerful when you stop looking at one record in isolation and instead compare state filings, operating-license clues, officers, addresses, websites, and public-company disclosures where applicable.
What this section is good for
Use this category to identify who stands behind an entity, whether a business appears across multiple jurisdictions, whether officers repeat across entities, and whether public filings reveal addresses or timelines that matter.
What this section is weak for
It is weak when the researcher assumes one officer name or one entity filing proves active control without checking dates, role type, or whether the address and timeline still fit.
Resources in alphabetical order
OpenCorporates
Good for: cross-jurisdiction company searching and officer or entity lead development.
How to use it: Search the exact company name first, then search officer names, addresses, or jurisdictions separately. Compare everything to state-source records.
What useful results look like: The same officer, address, or company appearing across more than one jurisdiction or record group.
What weak results look like: Common company names with no address or officer tie to your subject.
Best next step: Verify the strongest hit in the relevant state-source record system.
OpenCorporates Advanced Search
OpenCorporates Advanced Search
Good for: narrowing broad or common company names.
How to use it: Use address, jurisdiction, and officer clues to reduce noise and isolate the better match faster.
What useful results look like: A narrowed list that removes most of the non-matching entities.
What weak results look like: Too many entities with no location or officer anchor.
Best next step: Search the narrowed candidate in state records and domain research.
SEC EDGAR
Good for: public-company filings, officer references, subsidiaries, public addresses, and disclosure history.
How to use it: Use exact company names, tickers, or known filing-related individuals. Compare filing dates and disclosed information to the rest of your timeline.
What useful results look like: Officers, subsidiaries, or addresses that repeat elsewhere in your research.
What weak results look like: Broad ticker or company confusion when the company is not public or has a similar public-name match.
Best next step: Pull out the officers, subsidiaries, and addresses for follow-up research.
If you want the broader directory-style page that also groups Washington licensing resources, charity resources, official business lookups, and related agency paths in one place, use the Private Investigative Resources page.
Website, Domain, and Technical Footprint Research
Websites often reveal far more than people realize. Older versions of a site, domain clues, email setup, technical services, and archived staff or address references can all become useful when business, identity, or timeline issues are being tested.
What this section is good for
Use this category when the investigation involves a website, business domain, online service footprint, prior business claims, old contact pages, infrastructure clues, or other digital-operations context.
What this section is weak for
It is weak when the researcher mistakes technical similarity for ownership proof or assumes that one domain clue by itself proves control.
Resources in alphabetical order
BuiltWith
Good for: seeing what technology stack a site appears to use.
How to use it: Enter the domain and review hosting, analytics, CMS, and service clues that may connect related sites or business operations.
What useful results look like: Repeated technology or services across multiple sites you already suspect are related.
What weak results look like: Common technology that many unrelated sites use.
Best next step: Compare the domain to archived pages and other domain tools.
ICANN Lookup
Good for: registrar and domain-registration reference information.
How to use it: Use it to confirm registrar and public registration context, then compare to other domain tools.
What useful results look like: Basic registration context that supports the broader website or business timeline.
What weak results look like: Limited public details due to privacy or registrar restrictions.
Best next step: Compare the same domain in SecurityTrails, Wayback, and search-engine results.
MXToolbox
Good for: mail-related technical checks and DNS-related lead development.
How to use it: Use exact domains and compare the results to other technical-footprint tools.
What useful results look like: Mail and DNS detail that fits the company or domain pattern you are already testing.
What weak results look like: Technical output with no clear relevance to the investigative question.
Best next step: Only keep clues that matter to the identity or company question.
SecurityTrails
Good for: domain, DNS, and internet-asset lead development.
How to use it: Use it when you need a broader domain-footprint view and want to compare infrastructure clues across related domains.
What useful results look like: A domain pattern that helps explain whether multiple sites belong in the same research cluster.
What weak results look like: Technical relationships with no supporting identity or business connection.
Best next step: Compare the domain pattern to websites, archived pages, and companies.
urlscan.io
Good for: page and domain scan context.
How to use it: Use it to examine what public scan data or related requests may exist around a specific URL or domain.
What useful results look like: Page-level or domain-level details that support the broader web footprint.
What weak results look like: Technical detail that does not answer the actual case question.
Best next step: Keep only the technical clues that connect back to the subject or business.
VirusTotal
Good for: domain, URL, and file reputation context plus technical lead development.
How to use it: Use exact domains or URLs and compare any useful infrastructure clues to other technical sources.
What useful results look like: Domain or URL history that helps explain the site’s footprint or credibility context.
What weak results look like: Reputation detail that does not materially affect the investigative question.
Best next step: Use it only where the website or domain is actually part of the issue.
Wayback Machine
Good for: historical website snapshots. Archived content can reveal prior phone numbers, prior addresses, old staff names, prior service claims, and previous branding.
How to use it: Enter the exact domain or URL, choose relevant years, and compare older snapshots to the current site and business records. Save changed phone numbers, addresses, names, and service descriptions.
What useful results look like: Clear changes in contact info, services, staff, or branding across time.
What weak results look like: Snapshot gaps or archived pages with too little relevant content.
Best next step: Search the changed phone numbers, names, addresses, and services separately.
Flight Tracking and Airport Arrival / Departure Research
Flight research is one of the most misunderstood categories. Its real value is usually not proving with certainty that a person was on one specific aircraft. Its value is narrowing what was plausible based on route, airport, airline, arrival window, departure window, and travel timeline.
What this section is good for
Use this category to evaluate whether a travel story is plausible, narrow likely flights, test whether an arrival window makes sense, compare airport timing to social posts or meetings, and identify which flight paths are worth closer scrutiny.
What this section is weak for
It is weak when the researcher overstates the result. Flight tools usually help with plausibility, narrowing, and timing, not certain passenger identification.
Why this can be valuable to readers and researchers
When someone claims they traveled on a certain day, came from a specific city, arrived before a meeting, or could not have been in one location because they were supposedly in another, flight-board and route research can help pressure-test the timeline. The result is usually a better narrowed list of possibilities, not instant certainty.
Resources in alphabetical order
ADS-B Exchange
Good for: broader raw flight-tracking context, including aircraft movement review that may be useful when comparing more filtered flight tools.
How to use it: Use airport, route, tail, or time-window clues and compare to the same timeframe in other flight tools.
What useful results look like: Aircraft movement that supports the narrowed route and timing window you are already testing.
What weak results look like: Aircraft data that does not actually narrow the human timeline issue.
Best next step: Reframe the conclusion around plausibility, not certainty.
FlightAware
Good for: real-time, historical, and predictive flight insights, live airport boards, route lookups, delays, and historical flight review.
How to use it: Start with the airport or route, then narrow by date and time. Compare scheduled, estimated, and actual arrival or departure windows to the claimed timeline. Check airport boards first, then route-specific data.
What useful results look like: A small set of flights whose actual timing plausibly matches the subject’s claimed movement.
What weak results look like: Searching too broadly by airline only, or confusing airport-board availability with confirmed passenger identity.
Best next step: Compare the narrowed route list to social-media posts, hotel timing, meeting start time, rental-car timing, or other evidence.
FlightStats
Good for: alternate flight-status and route checks.
How to use it: Use it as a comparison source when cross-checking a flight number, route, or airport timing window.
What useful results look like: Overlapping timing information that confirms or narrows your first result.
What weak results look like: Broad searches with no date and route anchor.
Best next step: Keep only the overlapping timing information.
Flightradar24
Good for: live air-traffic map review, airport detail, search by flight, airport, airline, origin, or destination, and historical playback on supported tiers.
How to use it: Search the airport first, then search likely routes. Compare available route and airport data to the subject’s claimed movements.
What useful results look like: A route and airport view that narrows the likely departure or arrival window.
What weak results look like: Map browsing with no clear route, airport, or time objective.
Best next step: Write down the narrowed arrival and departure windows and compare them elsewhere.
Better investigative workflow for flight research
Identify the likely departure and arrival airports.
Identify the likely travel date and realistic time window.
Check airport arrivals and departures first.
Check route options on FlightAware and Flightradar24.
Compare the airport timing to the claimed schedule, meeting time, hotel arrival, social post, or other evidence.
Frame the conclusion correctly: likely, plausible, narrowed, or inconsistent. Do not overstate what the data proves.
Important: Flight research is strongest as a timeline and plausibility tool. It generally does not prove passenger identity by itself.
If you want the broader resource page that also groups airport, travel, official agency, and investigative reference links in one place, use the Private Investigative Resources page.
Historical, Family, Cemetery, and Archive Research
Historical and family research is incredibly useful when the matter involves old addresses, prior surnames, deceased relatives, marriage clues, household reconstruction, genealogy, cemetery data, obituary pathways, or older local-record trails that consumer databases do not explain well.
What this section is good for
Use this category when you need to reconstruct family lines, track historical households, test surname changes, identify likely relatives, narrow a county or state for deeper record searching, or find death and burial clues.
What this section is weak for
It is weak when the researcher follows one same-name person through history without checking family clusters, place consistency, and chronology.
Resources in alphabetical order
Ancestry
Good for: family reconstruction, surname changes, household relationships, historical record leads, and timeline support.
How to use it: Start with one anchored identifier such as exact name, approximate age, spouse, parent, or child. Build outward slowly. Track family clusters, not just one record.
What useful results look like: A family pattern that repeats across households, locations, and time periods.
What weak results look like: Same-name ancestors or unrelated family branches being mistaken for the subject line.
Best next step: Verify the strongest family clues in archives, obituaries, cemeteries, or state records.
FamilySearch
Good for: genealogy collections, indexed historical records, and family-cluster reconstruction.
How to use it: Use family clusters, not one isolated result, to confirm you are following the right person. Compare locations, spouses, parents, and children together.
What useful results look like: A coherent family cluster that points you to the next exact record or county.
What weak results look like: Isolated index entries with no family or geography context.
Best next step: Move the cluster into archive or obituary research.
Find A Grave
Good for: death-location leads, cemetery clues, family-member linking, and burial-related lead development.
How to use it: Search by exact name first, then narrow by state, county, and date clues. Review linked memorials carefully and compare family names.
What useful results look like: A memorial with dates, cemetery, and linked relatives that fit the case.
What weak results look like: Same-name memorials with no family or date fit.
Best next step: Search the county, obituary, or archive record set that matches the cemetery clue.
King County Archives
Good for: local historical record-series guidance and county archive research.
How to use it: Use it when a King County issue appears older, local, or less likely to be solved through modern consumer databases. Search the archive record categories and note the exact record series.
What useful results look like: A record series or archive path that clearly fits the historical problem.
What weak results look like: Broad archive browsing with no county, family, or time anchor.
Best next step: Search the exact record series or archive guidance you identified.
Washington State Digital Archives
Washington State Digital Archives
Good for: historical county and statewide record searching, including many indexed Washington records.
How to use it: Search exact names first, then narrow by county, record series, and date range. Save record-series names because they often tell you where the next useful source is.
What useful results look like: Marriage, death, local court, or county record clues that fit the family and place pattern.
What weak results look like: Same-name entries with no county or family fit.
Best next step: Search the matching county or record series more deeply.
How to Verify What You Find
This is the part that separates competent research from junk research. Verification matters more than volume.
What this section is good for
Use this section to pressure-test your results before you repeat them, rely on them, send them to someone else, or treat them like they establish a fact.
Label each result as verified, likely, or unverified.
Check every major fact against at least two or three independent sources.
Compare the date of the source to the date you are trying to prove.
Compare geography, relatives, businesses, and timeline clues to make sure the result still fits.
Do not let one flashy result outweigh multiple quieter contradictory sources.
Save the URL, date observed, and what exactly the source showed.
Strong verification questions
Does this result fit the age and geography?
Does it fit the timeline?
Does it repeat across unrelated source types?
Would I still trust this result if the most exciting detail were removed?
Verification rule: Repetition inside the same data ecosystem is not the same thing as independent confirmation.
Common Research Mistakes
Stopping at the first result that looks close enough
Confusing an old address with a current address
Assuming a court hit belongs to the right person without cross-checking identifiers
Treating a consumer-database result like official proof
Ignoring the timeline
Failing to save the source path
Letting the theory drive the research instead of letting the records narrow the theory
Using social media or flight data as if they prove more than they really do
Following one same-name person too far without checking the family cluster
Failing to search repeated identifiers separately
Master Resource List
The list below is organized by category, with resources alphabetized inside each category for easier reference and cleaner maintenance.
Business, Entity, and Financial Research
Email, Breach, and Contact Research
Flight Tracking and Airport Research
Historical, Family, Cemetery, and Archive Research
People-Search and Data-Broker Websites
Property, Recorder, and Parcel Research
Public Records and Government Research
Search Engines and Search Operators
Username and Account-Discovery Tools
Website, Domain, and Technical Footprint Research
Frequently Asked Questions
1. What is the best place to start?
Start with the strongest verified identifier you have, not the broadest guess you can make.
2. Are people-search sites accurate?
Sometimes. They are useful for lead generation, but they should not usually be treated as final proof without cross-checking.
3. Why put DOR before SOS?
Because DOR often helps surface business-license and trade-name clues that are highly useful in practical research, while SOS helps more with formal entity structure and officer history.
4. Why does flight research matter on a page like this?
Because travel claims and movement timelines often matter. Flight-board and route research can help narrow what was plausible and what appears inconsistent.
5. Why are category explanations important?
Because many readers do not just need links. They need to know what each source category is actually useful for, where it is weak, and why it matters.
6. How do I know whether a result is actually useful?
A useful result fits the geography, fits the timeline, repeats across unrelated source types, and gives you a concrete next step such as another address, a parcel, an officer name, a case number, a county, or a username to test.
If you want the broader reference page built around resources, official directories, reporting paths, and agency links rather than step-by-step execution, use the Private Investigative Resources page.
Confidential Review
If your own research has hit a wall, the facts do not line up, or you need a lawful investigator to go beyond surface-level public searches, Washington State Investigators can review the matter confidentially.
Helpful information for an initial review: names, aliases, dates, locations, usernames, business names, phone numbers, email addresses, known addresses, parcel details, flight or travel dates, and a short timeline of what you already checked.
If you want to browse the broader companion page before contacting us, use the Private Investigative Resources page for official directories, reporting channels, agency links, and related public-resource categories.
Need a Professional Investigator?
If your own research has hit a wall, the records do not make sense, or you need lawful, evidence-driven investigative research that goes beyond surface-level search results, Washington State Investigators is ready to assist.
Get a Confidential Consultation
Call 206-661-0412 | SMS 425-835-3860 | Email info@wsipi.com
WASHINGTON STATE INVESTIGATORS