Planned Changes to IPv4 Reverse DNS Infrastructure

Posted: Wednesday, 15 December 2010

ARIN and ICANN are planning changes to the infrastructure which supports the IPv4 Reverse DNS, the part of the DNS which provides the ability to look up an IPv4 address and convert it to a name.

With this change the IN-ADDR.ARPA zone will move to new, dedicated nameservers, five operated by the Regional Internet Registries (RIRs) and one operated by ICANN.

ARIN has carried out the DNS zone maintenance function for IN-ADDR.ARPA since 1997. This function will transition in February 2011 to ICANN and will be managed concurrently with the central assignment of IPv4 address space to RIRs. Once the IN-ADDR.ARPA zone is being maintained by ICANN it will also be signed using DNS Security Extensions (DNSSEC), providing end-users with the ability to validate answers to reverse DNS queries.

For more information and details please see:  and


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