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Registration Data Access Protocol (RDAP) Reverse search capabilities

Document Type Replaced Internet-Draft (individual)
Expired & archived
Authors Mario Loffredo , Maurizio Martinelli
Last updated 2019-01-31
Replaced by draft-ietf-regext-rdap-reverse-search
RFC stream (None)
Intended RFC status (None)
Stream Stream state (No stream defined)
Consensus boilerplate Unknown
RFC Editor Note (None)
IESG IESG state Replaced by draft-ietf-regext-rdap-reverse-search
Telechat date (None)
Responsible AD (None)
Send notices to (None)

This Internet-Draft is no longer active. A copy of the expired Internet-Draft is available in these formats:


The Registration Data Access Protocol (RDAP) does not include query capabilities to find the list of domains related to a set of entities matching a given search pattern. Even if such capabilities, commonly referred as reverse search, respond to some needs not yet readily fulfilled by the current Whois protocol, they have raised concerns from two perspectives: server processing impact and data privacy. Anyway, the impact of the reverse queries on RDAP servers processing is the same as the standard searches and it can be reduced by implementing policies to deal with large result sets, while data privacy risks can be prevented by RDAP access control functionalities. This document describes RDAP query extensions that allow clients to request a reverse search based on the domains- entities relationship.


Mario Loffredo
Maurizio Martinelli

(Note: The e-mail addresses provided for the authors of this Internet-Draft may no longer be valid.)