The Registration Data Access Protocol (RDAP) enables users to access current registration data and was created as an eventual replacement for the WHOIS protocol. RDAP was developed by the technical community in the Internet Engineering Task Force (IETF).
RDAP is a protocol that delivers registration data like WHOIS, but its implementation will change and standardize data access and query response formats. RDAP has several advantages over the WHOIS protocol, including support for internationalization, secure access to data, and the ability to provide differentiated access to registration data.

Feature of RDAP

  1. It can only be accessed via HTTPS protocol (RFC7480)
  2. RESTful query format is required (RDC7482)
  3. HTTP/GET method is used for RDAP request (RFC7480)
  4. The response of it support JSON format (RFC7483)

Support query

The query support pattern url: https://whois.nic.mtr/rdap/{query type}/{query field}

Query Type

  1. domain
  2. nameserver
  3. entity

domain query

Query the domain detail by domain name.


  • https://whois.nic.mtr/rdap/domain/nic.mtr

nameserver query

Query the nameserver detail by nameserver name and nameserver ip


  • https://whois.nic.mtr/rdap/nameserver/ns7.nic.mtr
  • https://whois.nic.mtr/rdap/nameserver/
  • https://whois.nic.mtr/rdap/nameserver/2001:dca:4000::cb77:2ac

registrar query

Query the registrar detail by registrar name


  • https://whois.nic.mtr/rdap/entity/mtr