Root Servers.
Snapshot · 18 Sep 2026

H-Root

Operational
h.root-servers.net

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

AS1508AnycastIPv4 + IPv6DNS RootU.S. Army ARL

What H-Root is

H-Root is the root server identity h.root-servers.net. It is one of the 13 named authorities for the DNS root zone, is operated by the U.S. Army DEVCOM Army Research Lab, and is served from multiple published locations using the same root-service addresses.

Global servicePublished sites across multiple regions
Root authorityAnswers authoritative queries for the root zone
Anycast deliveryOne service identity announced from many sites

Network & Service

Hostname
h.root-servers.net
IPv4
198.97.190.53
IPv6
2001:500:1::53
ASN
AS1508
Operator
U.S. Army DEVCOM Army Research Lab
Transport
DNS over UDP / TCP · port 53
Address families
IPv4 and IPv6

Deployment Snapshot

12Published sitesroot-servers.org
12Operationalcurrent snapshot
0Suspendedcurrent snapshot
0Decommissionedcurrent snapshot

Global Anycast Service

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

H-Root
DenverFrankfurtHong Kong
H-Root198.97.190.532001:500:1::53
LondonSydney+ more sites

Published Locations

All published H-Root sites from the operator-published dataset.

View All Locations
LocationSite typeIPv4IPv6Instances
Aberdeen Proving Ground, USGlobalEnabledEnabled1
Denver, USGlobalEnabledEnabled1
Dubai, AEGlobalEnabledEnabled1
Frankfurt, DEGlobalEnabledEnabled1
Hong Kong, HKGlobalEnabledEnabled1
Johannesburg, ZAGlobalEnabledEnabled1
London, GBGlobalEnabledEnabled1
Miami, USGlobalEnabledEnabled1
San Diego, USGlobalEnabledEnabled1
Sao Paulo, BRGlobalEnabledEnabled1
Sydney, AUGlobalEnabledEnabled1
Tokyo, JPGlobalEnabledEnabled1