Root Servers.
Snapshot · 18 Sep 2026

A-Root

Operational
a.root-servers.net

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

AS7342AnycastIPv4 + IPv6DNS RootVerisign

What A-Root is

A-Root is the root server identity a.root-servers.net. It is one of the 13 named authorities for the DNS root zone, is operated by Verisign, Inc., 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
a.root-servers.net
IPv4
198.41.0.4
IPv6
2001:503:ba3e::2:30
ASN
AS7342
Operator
Verisign, Inc.
Transport
DNS over UDP / TCP · port 53
Address families
IPv4 and IPv6

Deployment Snapshot

56Published sitesroot-servers.org
56Operationalcurrent snapshot
0Suspendedcurrent snapshot
0Decommissionedcurrent snapshot

Global Anycast Service

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

A-Root
AmsterdamAshburnSingapore
A-Root198.41.0.42001:503:ba3e::2:30
StockholmTokyo+ more sites

Published Locations

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

View All Locations
LocationSite typeIPv4IPv6Instances
San Jose, USGlobalEnabledEnabled1
Seattle, USLocalEnabledEnabled1
Singapore, SGGlobalEnabledEnabled1
Stockholm, SEGlobalEnabledEnabled1
Tokyo, JPGlobalEnabledEnabled1