Reverse WHOIS API

The Reverse Whois API provides a list of domain names that share the same Registrant Information. You can enter terms that describe a domain owner, like an email address or a company name, and you’ll get a list of domain names that have your search terms listed in the Whois record.

https://api.domaintools.com/v1/reverse-whois/?terms=DomainTools%20LLC|Seattle&mode=purchase

Reverse Whois Parameters

Parameters	Description
terms	Required. List of one or more terms to search for in the Whois record, separated with the pipe character (|).
exclude	Domain names with Whois records that match these terms will be excluded from the result set. Separate multiple terms with the pipe character (|).
scope	Sets the scope of the report to include only current Whois records, or to include both current and historic records. Value must be current (the default) or historic.
mode	quote: only lists the size and retail price of the query if you have per-domain pricing access; purchase: includes the complete list of domain names that match the query.

Sample Response

{
  response: {
    domain_count: {
      current: 310,
      historic: 412
    },
    domains: ['bulk-check.com',
              'bulkcheck.com',
              'comaintools.com',
              'dailychanges.com',
              ...
              ],
    report_price: {
      current: 299,
      historic: 299
    }
  }
}

Sample Queries

• HTML: https://api.domaintools.com/v1/reverse-whois/?terms=DomainTools%20LLC|Seattle&mode=purchase&format=html
• JSON: https://api.domaintools.com/v1/reverse-whois/?terms=DomainTools%20LLC|Seattle&mode=purchase
• XML: https://api.domaintools.com/v1/reverse-whois/?terms=DomainTools%20LLC|Seattle&mode=purchase&format=xml