Client Subnet in DNS Requests

Document Type Expired Internet-Draft (individual)
Authors Carlo Contavalli  , Wilmer van der Gaast  , Sean Leach  , Warren Kumari 
Last updated 2015-04-06 (latest revision 2014-10-03)
Stream (None)
Intended RFC status (None)
Expired & archived
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Stream Stream state (No stream defined)
Consensus Boilerplate Unknown
RFC Editor Note (None)
IESG IESG state Expired
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This Internet-Draft is no longer active. A copy of the expired Internet-Draft can be found at


This draft defines an EDNS0 extension to carry information about the network that originated a DNS query, and the network for which the subsequent reply can be cached. IESG Note [RFC Editor: Please remove this note prior to publication ] This informational document describes an existing, implemented and deployed system. It was originally going to be an Experimental document, but is now detailing a deployed system.


Carlo Contavalli (
Wilmer van der Gaast (
Sean Leach (
Warren Kumari (

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