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NXDOMAIN really means there is nothing underneath

Document Type Replaced Internet-Draft (dnsop WG)
Expired & archived
Authors Stéphane Bortzmeyer , Shumon Huque
Last updated 2015-12-20 (Latest revision 2015-11-29)
Replaced by draft-ietf-dnsop-nxdomain-cut
RFC stream Internet Engineering Task Force (IETF)
Intended RFC status Proposed Standard
Additional resources Mailing list discussion
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 (None)
Responsible AD (None)
Send notices to "Tim Wicinski" <>

This Internet-Draft is no longer active. A copy of the expired Internet-Draft is available in these formats:


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].


Stéphane Bortzmeyer
Shumon Huque

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