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WhoisThisDomain

Free#11 of 27 in WHOIS Lookup Tools

WhoisThisDomain: A free Windows WHOIS tool for multi-domain research and export. Ranked #11 of 27 in WHOIS Lookup Tools by our editors (7.7/10); pricing: Free plan; best for free Windows desktop WHOIS research.

7.7/10Editor score
Visit NirSoft
WhoisThisDomain7.7 Visit NirSoft

At a glance

  • Editor score
    7.7 / 10
  • Pricing
    Free plan
  • Best for
    Free Windows desktop WHOIS research
  • Free plan
    Yes
  • Paid from
    Free
  • API access
    None
  • Founded
    2001
  • Facts checked
    22 Sep 2026

  • Where it wins

    • Supports generic, country-code, and internationalized domain names
    • Handles multiple domains with combination-building tools
    • Exports selected results to CSV or tab-delimited files

  • Where it doesn't

    • Windows-only platform support
    • No API access for automated integrations
    • WHOIS fields depend on what servers provide

Our verdict on WhoisThisDomain

WhoisThisDomain is a free Windows desktop utility for retrieving domain registration records from WHOIS servers. It suits researchers, domain owners, and operations teams that need a focused desktop tool for checking registered domains rather than a broader web-based platform. Automatic WHOIS-server selection by top-level domain supports both generic and country-code domains, while internationalized domain-name support extends coverage to domains using non-ASCII characters. The software has been available since 2001 and is provided by NirSoft.

Its strongest area is practical lookup depth for desktop research. Users can submit one domain or multiple domains, build combinations of domain names and extensions, and review registration, expiration, and last-update dates when available. Custom WHOIS server lists are useful when the default server selection needs adjustment. Command-line domain loading also gives technical users a way to feed domains into the utility, while SOCKS proxy settings add network configuration flexibility. Selected results can be saved as CSV or tab-delimited files for analysis or sharing.

WhoisThisDomain is a good fit when the requirement is free, Windows-based WHOIS research with multiple-domain lookup and straightforward export. It is less suitable for teams that need an API, cross-platform access, or a managed service integrated into monitoring and development workflows. The tool stays focused on WHOIS retrieval rather than presenting a wider domain-management system. Choose it for direct desktop investigation and repeatable file-based review; choose an alternative when automated application access or broader platform coverage is central to the workflow.

Your product? Our editors can test WhoisThisDomain in depth and publish a review, labelled as paid · from $149/mo →

WhoisThisDomain pricing

Plans Free planFree Free to use — no paid tier required for the core job.
See plans on nirsoft.net

WhoisThisDomain fact sheet

Free planYes
Paid fromFree
API accessNone
Bulk lookupYes
Historical WHOISNot verified
RDAP supportNot verified
Monthly lookup limitNot verified
Export formatsCSV, TSV
DeploymentDesktop
PlatformsWindows
SupportEmail, Docs
Built forSolo, Small business (editorial estimate)
PricingFree plan
Websitenirsoft.net
Facts checked22 Sep 2026

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Featured on iTechGuides

Featured on iTechGuides — WhoisThisDomain 7.7/10

WhoisThisDomain is listed in our WHOIS Lookup Tools directory. Add the badge to your site — it links back to this page.

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Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026

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