The Mission of Root Servers
is to serve the root zone faithfully without modification in a timely manner.
University of Maryland’s D-Root receives queries on:
- IPv4 address 199.7.91.13 from the range 199.7.91.0/24
- IPv6 address 2001:500:2D::D from the range 2001:500:2D::/48
These ranges originate from AS 10886.
D-Root supports AXFR over TCP queries of the root zone in support of RFC7706.
Additional Root Server Operators:
The University has been operating a root server at the request of the Internet Assigned Numbers Authority (IANA) since 1988 and serves the root zone as published by IANA without modification.
Explore additional organizations recognized as current root server operators and endeavors, including University of Maryland, below.
In Real Time:
University of Maryland’s D-Root
MAX works on behalf of the University of Maryland to help connect the world.
Root Domain Name Servers provide the essential core of the hierarchical Domain Name System (DNS), upon which Internet’s global domain name directory service is based and critical Internet services, such as the World-Wide Web and electronic mail, depend. The DNS root servers are potential points of failure for the entire Internet. For this reason, there are thirteen logical root servers worldwide, under the administration of twelve different organizational administrators.
The thirteen logical servers are designated by the first thirteen letters of the alphabet, “A” through “M,”and the logical server administered by the University of Maryland is referred to as the “D-Root server.”
Where in the World is D-Root?
Significant events and milestones for D-Root:
There was a massive DDos attack on the root name servers. Gerry Sneeringer of the University of Maryland co-authored an analysis report of that event with Paul Vixie (ISC) and Mark Schleifer (Cogent).
June 2011
D-Root started supporting IPv6.
January 2013
In anticipation of moving to anycasting, D-Root was transitioned from its original UMD local IP address 128.8.10.90 (once known as terp.umd.edu) to its current address, 199.7.91.13.
April 3, 2013
UMD partnered with Packet Clearing House to provide expanded anycasting opportunities using the server and network facilities in their various data centers around the world.
October 2015
Wrote a packet monitoring system that examines each D-Root server’s incoming and outgoing traffic for the purposes of creating the RSSAC002 Metric data and operational monitoring.
October 16, 2015
Started publishing RSSAC002 Metric data.
March 2016
Participated in the RSSAC002v3 working party.
November 2017
D-Root to moved AS 10886.
May 2018
Transitioned from BIND to NSD.