RFC 8521 · BEST CURRENT PRACTICE · 2018

Registration Data Access Protocol Object Tagging

Overview

RFC 8521, “Registration Data Access Protocol Object Tagging”, is a Best Current Practice document published in November 2018 by S. Hollenbeck, A. Newton. It updates RFC 7484. The canonical text is published by the RFC Editor.

Abstract

The Registration Data Access Protocol (RDAP) includes a method that can be used to identify the authoritative server for processing domain name, IP address, and autonomous system number queries. The method does not describe how to identify the authoritative server for processing other RDAP query types, such as entity queries. This limitation exists because the identifiers associated with these query types are typically unstructured. This document updates RFC 7484 by describing an operational practice that can be used to add structure to RDAP identifiers and that makes it possible to identify the authoritative server for additional RDAP queries.

Abstract as published in the RFC, via rfc-editor.org.

What “Best Current Practice” means

Documents the IETF community's recommended operational or procedural practice rather than a protocol specification.

Read this RFC

The canonical text of RFC 8521 is hosted at rfc-editor.org. Available in TXT,HTML.

Relationships to other RFCs
This RFC updates
RFC 7484
Other RFCs from 2018

Who Is Online

In total there are 359 users online: 0 registered, 352 guests and 7 bots.

Most users ever online was 1,226 on 13 Jun 2026, 3:56 am.

Bots: AhrefsBot Applebot Bingbot Facebook Other Bot Other Crawler SemrushBot

Users active in the past 15 minutes. Total registered members: 354