Root Servers.
Snapshot · 18 Sep 2026

D-Root

Operational
d.root-servers.net

One of the 13 named authorities configured for the DNS root zone.

AS10886AnycastIPv4 + IPv6DNS RootU of Maryland

What D-Root is

D-Root is the root server identity d.root-servers.net. It is one of the 13 named authorities for the DNS root zone, is operated by the University of Maryland, and is served from 231 published locations using the same root-service addresses.

Global service231 published sites across 100+ cities worldwide
Root authorityAnswers authoritative queries for the root zone
Anycast deliveryOne service identity announced from many sites

Network & Service

Hostname
d.root-servers.net
IPv4
199.7.91.13
IPv6
2001:500:2d::d
ASN
AS10886
Operator
University of Maryland
Transport
DNS over UDP / TCP · port 53
Address families
IPv4 and IPv6

Deployment Snapshot

231Published sitesroot-servers.org
165Operationalcurrent snapshot
0Suspendedcurrent snapshot
0Decommissionedcurrent snapshot

Global Anycast Service

Same root-service addresses, published from multiple network sites.

D-Root
AmsterdamAshburnChicago
D-Root199.7.91.132001:500:2d::d
LondonParis+ more sites

Published Locations

Selected examples from the operator-published dataset. This is not the complete list.

View All Locations
LocationSite typeIPv4IPv6Instances
Amsterdam, NLGlobalEnabledEnabled1
Ashburn, USGlobalEnabledEnabled1
Chicago, USGlobalEnabledEnabled1
London, GBGlobalEnabledEnabled1
Tokyo, JPGlobalEnabledEnabled1