IN-ADDR.ARPA NAMESERVER CHANGE COMPLETE This is a courtesy notification of the completion of a change to the nameserver set for the IN-ADDR.ARPA zone. There is no expected impact on the functional operation of the DNS due to this change. There are no actions required by DNS server operators or end users. For more information about this work, please see http://in-addr-transition.icann.org/. DETAIL The IN-ADDR.ARPA zone is used to provide reverse mapping (number to name) for IPv4. The servers which now provide authoritative DNS service for the IN-ADDR.ARPA zone are as follows: A.IN-ADDR-SERVERS.ARPA (operated by ARIN) B.IN-ADDR-SERVERS.ARPA (operated by ICANN) C.IN-ADDR-SERVERS.ARPA (operated by AfriNIC) D.IN-ADDR-SERVERS.ARPA (operated by LACNIC) E.IN-ADDR-SERVERS.ARPA (operated by APNIC) F.IN-ADDR-SERVERS.ARPA (operated by RIPE NCC) All root servers dropped the IN-ADDR.ARPA zone according to the schedule posted earlier, and all root servers now respond to queries under IN-ADDR.ARPA with an appropriate referral. Note that as part of this transition, the IN-ADDR.ARPA zone is now signed with DNSSEC and a complete chain of trust now exists from the root zone to the IN-ADDR.ARPA zone. IP6.ARPA, the corresponnding zone for IPv6 reverse mapping, was signed similarly some time ago. Regards, Joe Abley Director DNS Operations ICANN