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.

4.2 Billion+Domains and subdomains
1.1 Billion+NS records
52,000+Satisfied customers
11+Years of data crawling

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), 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 our large repository of historical DNS records, containing over 1 billion nameserver records with weekly record additions.

  • 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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