Safely search for domain availability | 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
WhoisXML API Predictive Threat Intelligence
Predictive Threat Intelligence

Detect and block access to and from dangerous domain names before malicious actors can weaponize them. Contact us today for more information.

WhoisXML API Internet Infrastructure
Internet Infrastructure

Unlock integrated intelligence on Internet properties and their ownership, infrastructure, and other attributes.

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.

Multi-Level API User Administration Now Available - Manage individual API keys for team members in your organization.

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Safely search for domain availability with Domain Availability Lookup

774 Million+Domains tracked
21.0 Billion+WHOIS records
7,596+TLDs and ccTLDs tracked
52,000+Satisfied customers

What is a domain availability lookup tool?

A domain availability lookup tool is one that goes through WHOIS records and checks the Domain Name System (DNS) to establish whether a domain is available for registration or already belongs to someone else.

Domain Availability Lookup

Why use Domain Availability Lookup?

  • Exhaustive

    Availability results are gathered by querying a WHOIS database that is updated daily and contains 21.0+ billion records.

  • Shareable results

    Each domain availability lookup report comes with a custom URL that you can share with your team members.

  • Safe domain search

    Every query made using Domain Availability Lookup remains strictly confidential.

Practical usage

Improve your domaining portfolio

Improve your domaining portfolio

  • Domain Availability Lookup lets you check if a domain name is available without going through a registrar, making your query private.

Boost your marketing efforts

  • Check if a domain in your contact list is still registered. If not, it may indicate that a supplier or customer is no longer in business.
Boost your marketing efforts
Update your blacklists

Update your blacklists

  • Check if a domain name previously used in a cyberattack is still active.

Get ready for the next step

  • Test the waters with Domain Availability Lookup before integrating its API version into your solutions or running more comprehensive domain analyses with WHOIS Lookup.
Get ready for the next step
Domain Availability Lookup | WhoisXML API

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