Registration Data Access Protocol Regional Internet Registry Search
RFC 9910, “Registration Data Access Protocol Regional Internet Registry Search”, is a Proposed Standard document published in January 2026 by T. Harrison, J. Singh. The canonical text is published by the RFC Editor.
Abstract
The Registration Data Access Protocol (RDAP) is used by Regional Internet Registries (RIRs) and Domain Name Registries (DNRs) to provide access to their resource registration information. The core specifications for RDAP define basic search functionality, but there are various search options related to IP addresses, IP prefixes, and Autonomous System Numbers (ASNs), which are provided by RIRs via their WHOIS services, but for which there is no corresponding RDAP functionality. This document extends RDAP to support those search options.
What “Proposed Standard” means
An entry-level standards-track specification: stable, peer-reviewed and a solid basis for implementation, though it may still evolve before becoming an Internet Standard.
The canonical text of RFC 9910 is hosted at rfc-editor.org. Available in HTML,TXT,PDF,XML.
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