RFC 5737 · INFORMATIONAL · 2010
TUE · 28 JUL 2026
IPv4 Address Blocks Reserved for Documentation
Overview
RFC 5737, “IPv4 Address Blocks Reserved for Documentation”, is an Informational document published in January 2010 by J. Arkko, M. Cotton, L. Vegoda. It updates RFC 1166. The canonical text is published by the RFC Editor.
Abstract
Three IPv4 unicast address blocks are reserved for use in examples in specifications and other documents. This document describes the use of these blocks. This document is not an Internet Standards Track specification; it is published for informational purposes.
What “Informational” means
Published for the general information of the community. It does not define an IETF standard and carries no standards-track status.
Read this RFC
The canonical text of RFC 5737 is hosted at rfc-editor.org. Available in TXT,HTML.
Relationships to other RFCs
Other RFCs from 2010
- RFC 5736 IANA IPv4 Special Purpose Address Registry
- RFC 5738 IMAP Support for UTF-8
- RFC 5735 Special Use IPv4 Addresses
- RFC 5739 IPv6 Configuration in Internet Key Exchange Protocol Version 2
- RFC 5728 The SatLabs Group DVB-RCS MIB
- RFC 5746 Transport Layer Security Renegotiation Indication Extension
- RFC 5727 Change Process for the Session Initiation Protocol and the Real-time Applications and Infrastructure Area
- RFC 5747 4over6 Transit Solution Using IP Encapsulation and MP-BGP Extensions