Using the Universal Character Set in the Domain Name System (UDNS)

Document Type Expired Internet-Draft (idn WG)
Author Dan Oscarsson 
Last updated 2001-08-20
Stream Internet Engineering Task Force (IETF)
Intended RFC status (None)
Expired & archived
pdf htmlized (tools) htmlized bibtex
Stream WG state WG Document
Document shepherd No shepherd assigned
IESG IESG state Expired
Consensus Boilerplate Unknown
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Responsible AD (None)
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This Internet-Draft is no longer active. A copy of the expired Internet-Draft can be found at


Since the Domain Name System (DNS) [RFC1035] was created there have been a desire to use other characters than ASCII in domain names. Lately this desire have grown very strong and several groups have started to experiment with non-ASCII names. This document defines how the Universal Character Set (UCS) [ISO10646] is to be used in DNS. It includes both a transition scheme for older software supporting non-ASCII handling in applications only, as well as how to use UCS in labels and having more than 63 octets in a label.


Dan Oscarsson (

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