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 Advanced Cyberinfrastructure and Internet Global Services group within 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, recognizes the following organizations as current root server operators and endeavors to coordinate operational service with them:

D-Root receives queries on:

These ranges originate from AS 10886.

D-Root supports AXFR over TCP queries of the root zone in support of RFC7706.

For operational issues related to the D-Root server, please contact the MAX Network Operations Center at +1 301 314 6666


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Last modified: March 13, 2018
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