Check WHOIS data how it suits you with our products | WhoisXML API
Products APIs Data Feeds Web Tools Domain Research & Monitoring Enterprise Packages
WHOIS / WHOIS History
WHOIS / WHOIS History

Provide current and historical ownership information on domains / IPs. Identify all connections between domains, registrants, registrars, and DNS servers.

DNS / DNS History
DNS / DNS History

Look into all current and historical DNS / IP connections between domains and A, MX, NS, and other records. Monitor suspicious changes to DNS records.

IP Geolocation / IP Netblocks
IP Geolocation / IP Netblocks

Get detailed context on an IP address, including its user’s geolocation, time zone, connected domains, connection type, IP range, ASN, and other network ownership details.

Domain Research Suite (DRS)
Domain Research Suite (DRS)

Access our web-based solution to dig into and monitor all domain events of interest.

Domain Research Suite (DRS)
Domain Research Suite (DRS)

Get access to a web-based enterprise-grade solution to search and monitor domain registrations and ownership details for branded terms, fuzzy matches, registrants of interest, and more.

Research
Monitoring
White-Label
Enterprise API Packages
Enterprise API Packages

Our complete set of domain, IP, and DNS intelligence available via API calls as an annual subscription with predictable pricing.

Security Intelligence (SI) Suite
Security Intelligence (SI) Suite

Offers complete access to WHOIS, IP, DNS, and subdomain data for product enrichment, threat hunting and more.

Premium API Services
Premium API Services

Enjoy priority data access with our premium API services topped with extra perks including dedicated team support, enterprise-grade infrastructure, and SLAs for full scalability and high performance.

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API Lookup Database Download Suite Bulk API Bulk Lookup

Our WHOIS data is well-parsed and normalized for any domain name, IP address, or email account

We provide a variety of WHOIS data consumption models, including APIs, lookup tools, and direct access to our 20.0B+ historical WHOIS records via database downloads.

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500 free API requests. No credit card required.

565 Million+Active domains tracked
20.0 Billion+WHOIS records
7,596+TLDs and ccTLDs tracked
52,000+Satisfied customers
See all coverage stats

What is WHOIS?

Despite the capital letters in “WHOIS”, it is not an acronym. Yet as the name suggests, a WHOIS record tells you all about a domain name’s registrant. Each WHOIS record gives pertinent details about the domain, including its age, registration status (creation, last update, and expiration dates), registrar, and owner. It allows users to obtain a domain owner’s contact details for reasons that include cyber investigation, market research, domain purchase, competitor monitoring, and more.

Our WHOIS record data is:

  • Exhaustive

    Our WHOIS database contains more than a billion records spanning domains and subdomains scattered across 7,596+ gTLDs, ccTLDs and ccSLDs.

  • Well-formatted for compatibility

    We parse and normalize all of our WHOIS data so it can be used as is or quickly integrated into a variety of internal systems.

  • Easy to work

    We provide query results in convenient formats across all of our products. API outputs are available in XML and JSON, database downloads in CSV and MySQL, and lookup reports are hosted using a custom URL and are shareable.

  • Readily accessible

    Near real-time data gathering means instantaneous access to accurate information, enabling better decision-making. Our WHOIS information is updated daily.

Our WHOIS data product line includes:

Lookup

Need domain data points such as registrant name, organization, email address, location, registrar information, creation/last update/expiration dates, availability, age, and more? WHOIS Lookup can help with web-hosted shareable reports.

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WHOIS Lookup | WhoisXML API
WHOIS API | WhoisXML API

API

A single API call is all you need to obtain WHOIS information for your various business requirements. Get the first 500 WHOIS API calls free of charge if you sign up for an account.

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Bulk processing

Our bulk WHOIS processing tools provide WHOIS records for an entire list of domains/IP addresses made via a single RESTful API or graphical user interface (GUI) query. Upload your existing data and download the results in comma-separated values (CSV) format.

Learn more about Bulk WHOIS API Learn more about Bulk WHOIS Lookup
Bulk WHOIS API/GUI | WhoisXML API
WHOIS Database Download | WhoisXML API

Data feed

We provide complete and relevant domain WHOIS data that can be customized and easily integrated into systems for all your business needs. We do our best to widen the scope of our database and boost its accuracy to offer data that is as well-structured as possible.

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Practical usage

Cybercrime Analysis

Enable your digital forensics and incident response (DFIR) and other cybersecurity teams to collate domain ownership information to enhance their solutions and find ties, if any, to ongoing malicious campaigns.

Fraud Prevention

Allow payment processors to look out for customer information discrepancies in WHOIS records to potentially catch fraudsters. Protect online shop owners from risks related to identity theft.

Attack Surface Management

Carefully screen domains based on their WHOIS records to keep your potential attack surface to a minimum. Ward off domains that don’t belong to legitimate companies from your network as early as the discovery stage.

Third-Party Monitoring

Make sure you are talking only to the authorized representatives of any third party you’re planning to do business with by scrutinizing their WHOIS record details.

Brand Protection

Simplify investigations by obtaining domain ownership information to spot signs of potential cybersquatting. Arm your brand protection agents with WHOIS data so they can pinpoint potential instances of trademark infringement.

Business and Competitor Monitoring

Be the first to obtain a potentially high-demand domain name by keeping track of all registration changes. Domains that changed hands could clue you into what your competitors are up to as well.

WHOIS Search Overview | WhoisXML API

Get 500 free API credits. No credit card required.

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