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Reverse DNS delegations resource guide

Definition

Reverse DNS delegations allow applications to map to a domain name from an IP address. Reverse delegation is achieved by use of the pseudo-domain names in-addr.arpa (IPv4) and ip6.arpa (IPv6).

Please note, APNIC registers only reverse delegations and is not involved in the domain name registration system.

Contents

• News
• Policy and reverse DNS information
• Request form

News

[January 2007]

On 1 January 2007, APNIC's lame DNS reverse delegation policy was modified to make the definition of lame DNS consistent with the definitions used by the other RIRs. Under the revised policy, if a delegated nameserver for a domain fails to return a valid authoritative answer for the domain's SOA, it will be considered to be lame. The process for monitoring and removing lame reverse DNS delegations has also been simplified.For more information please see:

• APNIC's lame DNS procedures.
• History of the lame DNS reverse delegation policy proposal.

[June 2006]

APNIC ceased all ip6.int reverse delegation services at approximately 10:00 UTC+10 (00:00 UTC) on 1 June, 2006. For more information on this change and how it may affect you, please see:

• Deprecation of ip6.int reverse DNS service FAQ.

Policy and reverse DNS information

Request form

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