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Registration Data Access Protocol (RDAP)

Registration Data Access Protocol (RDAP)

The Registration Data Access Protocol (RDAP) is an alternative protocol to WHOIS that specifies how to access internet resource registration data. It is specifically designed to address various shortcomings in WHOIS. It makes use of HTTPS and follows a RESTful (representational state transfer) web services model.

Using RDAP to query RIPE Database

The contents of RIPE database can be accessed using RDAP via{objectType}/{key} where {objectType} can either be any of the value listed in the table below.

List of supported object types
Object Type Description
autnum AUT-NUM objects
domain DOMAIN objects
ip INETNUM and INET6NUM objects
entity PERSON, ROLE and MNTNER objects

The value ofc{key} depends on the object type.

For example:

curl -v

queries IP information, while

curl -v

queries domain information.

If the RIPE Database is not authoritative for the requested resource, the response will redirect to the authoritative RIR.

RDAP Specification

The RDAP protocol is specified in the RFCs:

  • RFC 7480 – HTTP Usage in the Registration Data Access Protocol (RDAP)
  • RFC 7481 – Security Services for the Registration Data Access Protocol (RDAP)
  • RFC 9082 – Registration Data Access Protocol (RDAP) Query Format
  • RFC 9083 – JSON Responses for the Registration Data Access Protocol (RDAP)
  • RFC 7484 – Finding the Authoritative Registration Data (RDAP) Service
  • RFC 7485 – Inventory and Analysis of WHOIS Registration Objects

Known Issues

Known issues with the RDAP implementation for RIPE Database can be found on GitHub