RFC 9156 · PROPOSED STANDARD · 2021
SUN · 14 JUN 2026
DNS Query Name Minimisation to Improve Privacy
Overview
RFC 9156, “DNS Query Name Minimisation to Improve Privacy”, is a Proposed Standard document published in November 2021 by S. Bortzmeyer, R. Dolmans, P. Hoffman. It obsoletes RFC 7816. The canonical text is published by the RFC Editor.
Abstract
This document describes a technique called "QNAME minimisation" to improve DNS privacy, where the DNS resolver no longer always sends the full original QNAME and original QTYPE to the upstream name server. This document obsoletes RFC 7816.
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.
Read this RFC
The canonical text of RFC 9156 is hosted at rfc-editor.org. Available in HTML,TXT,PDF,XML.
Relationships to other RFCs
Other RFCs from 2021
- RFC 9155 Deprecating MD5 and SHA-1 Signature Hashes in TLS 1.2 and DTLS 1.2
- RFC 9157 Revised IANA Considerations for DNSSEC
- RFC 9154 Extensible Provisioning Protocol Secure Authorization Information for Transfer
- RFC 9158 Update to the Object Identifier Registry for the PKIX Working Group
- RFC 9159 IPv6 Mesh over BLUETOOTH Low Energy Using the Internet Protocol Support Profile
- RFC 9160 Export of MPLS Segment Routing Label Type Information in IP Flow Information Export
- RFC 9162 Certificate Transparency Version 2.0
- RFC 9164 Concise Binary Object Representation Tags for IPv4 and IPv6 Addresses and Prefixes