D Root

The Mission

The Mission of Root Servers is to serve the root zone faithfully without modification in a timely manner.

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.”

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.