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WhoisXML API Bulk WHOIS API

Freemium#18 of 27 in WHOIS Lookup Tools

WhoisXML API Bulk WHOIS API: A high-volume WHOIS API for investigations, research, and list-based workflows. Ranked #18 of 27 in WHOIS Lookup Tools by our editors (6.6/10); pricing: Free plan · pricing on request; best for bulk WHOIS processing at very large scale.

6.6/10Editor score

Visit WhoisXML API

WhoisXML API Bulk WHOIS API6.6 Visit WhoisXML API

At a glance

Editor score
6.6 / 10
Pricing
Free plan · pricing on request
Best for
Bulk WHOIS processing at very large scale
Free plan
Yes
API access
Full
Facts checked
20 Sep 2026

Where it wins
- Processes lists of up to 500,000 domains per query
- Returns parsed or raw WHOIS data in JSON and XML
- Offers CSV downloads, one-year storage, and a Python client
Where it doesn't
- Paid pricing uses a contact-sales model
- Historical WHOIS is not included
- The workflow is API-centered rather than a broad web lookup tool

Our verdict on WhoisXML API Bulk WHOIS API

WhoisXML API Bulk WHOIS API retrieves parsed WHOIS registration information for lists of domains and IP addresses through a hosted REST API. It is aimed at cybersecurity investigations, law enforcement, domain research, brand protection, marketing research, sales, and payment-processing workflows. The service supports bulk submissions rather than only one-domain lookups, making it a fit for teams that need to process large domain or IP lists programmatically.

Scale is the defining strength. A single query can include up to 500,000 domains, while results are available as parsed or raw WHOIS data. JSON and XML responses suit application workflows, and CSV downloads provide a practical option for analysis outside the API. Unique request IDs separate uploaded lists, and results are stored for one year. A Python client library can also reduce integration work for Python-based teams. The API provides full access, and the product includes 500 free API requests without requiring a credit card; paid access uses contact-sales pricing.

This is a focused choice for high-volume WHOIS collection, not a historical WHOIS research platform. Historical WHOIS is not included, so investigators needing prior registration states should choose a product built around historical records instead. The API-first delivery also makes it less suitable for buyers seeking a broad, browser-led lookup experience. Choose WhoisXML API Bulk WHOIS API when scale, structured output, list processing, and export flexibility matter most; choose an alternative when historical data or a primarily visual interface is the priority.

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

WhoisXML API Bulk WHOIS API pricing

Plans Free plan · pricing on requestFreemium A usable free plan; paid tiers unlock the limits above. Prices checked 20 Sep 2026.

See plans on whois.whoisxmlapi.com

WhoisXML API Bulk WHOIS API fact sheet

Free plan	Yes
Paid from	Not verified
API access	Full
Bulk lookup	Yes
Historical WHOIS	No
RDAP support	Not verified
Monthly lookup limit	Not verified
Export formats	CSV, JSON, XML
Deployment	Cloud
Platforms	Web
Support	Email, Phone, Docs
Built for	Small business, Mid-market, Enterprise (editorial estimate)
Pricing	Free plan · pricing on request (source)
Website	whois.whoisxmlapi.com
Facts checked	20 Sep 2026

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The editor score above is our own research. What this page doesn't have yet is a reader's view — what you used WhoisXML API Bulk WHOIS API for, what worked and what didn't. No stars are seeded and no review is paid for; an editor reads every one before it appears.

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Featured on iTechGuides

WhoisXML API Bulk WHOIS API 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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Last updated 7 Oct 2026 · How we research and update