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RFC 4343: Domain Name System (DNS) Case Insensitivity Clarification

Still current, but amended. Parts of this document are changed or extended by RFC 5890. Read both.

In plain English — editorial summary, not part of the RFC

Domain Name System (DNS) names are "case insensitive". This document explains exactly what that means and provides a clear specification of the rules. This clarification updates RFCs 1034, 1035, and 2181. [STANDARDS-TRACK]

Document record

Document ID
RFC4343
Published
January 2006
Authors
D. Eastlake 3rd
Status
PROPOSED STANDARD
Stream
IETF
Area
int
Pages
10
Also known as
—
Updates:
RFC 1034, RFC 1035, RFC 2181
Updated by:
RFC 5890

Referenced by

One later RFC formally updates or obsoletes part of this document.

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The document record above — title, authors, date, status, stream, area, relationships, DOI and errata — is imported verbatim from the public RFC Editor index. The “in plain English” section is editorial: written by The metasystema editorial team, not part of the RFC. Where the two differ, the RFC text governs.

Last checked against the RFC Editor index on . RFCs are never revised after publication; changes are issued as new documents.

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canonical URL: /rfc/4343-domain-name-system-dns-case-insensitivity-clarification