Reverse NS products to reveal all connected hostnames | WhoisXML API

Reverse NS products to find all domains that use the same nameserver

By using our reverse NS services, you can identify other domains that share your nameserver or use the same hosting company.

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500 free API requests. No credit card required.

1,4B+Domains and subdomains
196,463,291NS records updated daily
2,131Satisfied customers

Our reverse NS product line includes:


Our easy-to-use graphical user interface (GUI) tool returns a comprehensive list of domains that use the same nameserver or host.

Reverse NS Lookup | WhoisXML API
Reverse NS API | WhoisXML API


One API call helps you establish all domains with a common nameserver as well as the matching timestamp for each domain.

DNS Database Download

Our DNS database contains billions of historical records and can be downloaded in a user-friendly and well-parsed comma-separated values (CSV) or MySQL format, making it easily compatible with virtually any existing application.

DNS Database Download | WhoisXML API


  • Exhaustive and up-to-date

    Our reverse NS services retrieve data from the largest repository of historical DNS records. Aside from millions of domains and subdomains, the DNS database contains 196,463,291 nameserver records and counting as it gets updated daily.

  • Flexible integration

    All of our nameserver records are adequately parsed and formatted for use as-is with your applications. The data is always presented with adequate formatting.

Reverse NS Overview | WhoisXML API

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