ROOT SERVER D / d.root-servers.net

About D-Root

The Domain Name System is a distributed hierarchical database of resource records that permit (among other things) the translation of hostnames into IP addresses and vice versa. The root of this hierarchy is anchored on 13 domain name servers scattered across the globe. The D Root Server is operated by the Division of Information Technology at the University of Maryland in College Park, MD. The University has been operating a root server at the request of the Internet Assigned Numbers Authority (IANA) since 1988. The university serves the root zone as published by IANA without modification. The University, as operator of d.root-servers.net, recognizes the following organizations as current root server operators and endeavors to coordinate operational service with them:

Verisign, Inc.
University of Southern California, Information Sciences Institute
Cogent Communications, Inc.
University of Maryland
NASA Ames Research Center
Internet Systems Consortium, Inc.
US Department of Defense, Network Information Center
US Army Research Laboratory
Autonomica AB
RIPE NCC
ICANN
WIDE Project
For operational issues related to the D server, please contact the Division of IT Network Operations Center at +1 301 405 3003

Advisory: D-root is changing its IPv4 address on 3 January 2013.

This is advance notice that there is a scheduled change to the IPv4 address for one of the authorities listed for the DNS root zone and the .ARPA TLD. The change is to D.ROOT-SERVERS.NET, which is administered by the University of Maryland.

The new IPv4 address for this authority is 199.7.91.13

The current IPv6 address for this authority is 2001:500:2d::d and it will continue to remain unchanged.

This change is anticipated to be implemented in the root zone on 3 January 2013, however the new address is currently operational. It will replace the previous IP address of 128.8.10.90 (also once known as TERP.UMD.EDU).

We encourage operators of DNS infrastructure to update any references to the old IP address, and replace it with the new address. In particular, many DNS resolvers have a DNS root hints file. This should be updated with the new IP address.

New hints files will be available at the following URLs once the change has been formally executed:

The old address will continue to work for at least six months after the transition, but will ultimately be retired from service.