NXDOMAIN really means there is nothing underneath

Document Type Replaced Internet-Draft (dnsop WG)
Authors St├ęphane Bortzmeyer  , Shumon Huque 
Last updated 2015-12-20 (latest revision 2015-11-29)
Replaced by RFC 8020
Stream Internet Engineering Task Force (IETF)
Intended RFC status Proposed Standard
Expired & archived
pdf htmlized (tools) htmlized bibtex
Stream WG state Adopted by a WG
Document shepherd Tim Wicinski
IESG IESG state Replaced by draft-ietf-dnsop-nxdomain-cut
Consensus Boilerplate Unknown
Telechat date
Responsible AD (None)
Send notices to "Tim Wicinski" <tjw.ietf@gmail.com>

This Internet-Draft is no longer active. A copy of the expired Internet-Draft can be found at


This document states clearly that when a DNS resolver receives a response with response code NXDOMAIN, it means that the name in the question section AND ALL THE NAMES UNDER IT do not exist. REMOVE BEFORE PUBLICATION: this document should be discussed in the IETF DNSOP (DNS Operations) group, through its mailing list. The source of the document, as well as a list of open issues, is currently kept at Github [1].


St├ęphane Bortzmeyer (bortzmeyer+ietf@nic.fr)
Shumon Huque (shuque@verisign.com)

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