Subdomains Lookup | Find all subdomains | WhoisXML API

Find all the subdomains of a domain with Subdomains Lookup tools

Our subdomain finder tools allow you to discover the subdomains of any target domain to uncover potential attack entry points. Find systems that are less protected and thus more vulnerable to attacks.

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100 free requests monthly. No credit card required.

2.3+ billionSubdomains
2,864+TLDs tracking
10+ yearsof data crawling

Our subdomain finder product line includes:

Lookup

Just take a domain name and instantly get a complete list of subdomains with relevant update dates.

Subdomains Lookup | WhoisXML API
Subdomains Lookup API | WhoisXML API

API

With one API call, get a list of all subdomains related to a given domain name to discover any company’s web infrastructure, including yours so you can reduce your potential attack surface.

Subdomains Data Feed

We provide a large subdomain repository with 2.3+ billion records updated weekly and available for download in the form of an exhaustive and well-parsed comma-separated values (CSV) file.

Subdomains Data Feed | WhoisXML API

Benefits of Subdomains Lookup

  • Based on up-to-date data

    Each subdomain lookup gives you a list of all a domain’s subdomains (updated daily) from a large database compiled through a decade of data crawling.

  • Quick results

    Just take a domain name and do an instant subdomain enumeration for any target domain.

  • Handy

    Don’t bother with manual subdomain research with the help of our handy and fast Subdomains Lookup API.

Subdomains Lookup Overview | WhoisXML API

Get 100 free credits monthly. No credit card required.

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