A-Root
Online- Operator
- Verisign
- IPv4
- 198.41.0.4
- IPv6
- 2001:503:ba3e::2:30
AS7342IPv6AnycastGlobal
DNS Root Servers
Authoritative ReferenceThe readable interface over IANA, RSSAC, IETF, and root server operator data.
B-Root
Online- Operator
- USC-ISI
- IPv4
- 199.9.14.201
- IPv6
- 2001:500:200::b
AS394353IPv6AnycastGlobal
C-Root
Online- Operator
- Cogent Communications
- IPv4
- 192.33.4.12
- IPv6
- 2001:500:2::c
AS2149IPv6AnycastGlobal
D-Root
Online- Operator
- University of Maryland
- IPv4
- 199.7.91.13
- IPv6
- 2001:500:2d::d
AS10886IPv6AnycastGlobal
Why only 13 root servers?
The 13 named identities are a historical DNS design constraint. Today the system is delivered by distributed anycast instances worldwide.
Read the GuideResolverYour device
or network
or network
RootOne of 13
root identities
root identities
TLDe.g. .com,
.org, .net
.org, .net
AuthoritativeDomain's
name server
name server
E-Root
Online- Operator
- NASA Ames Research Center
- IPv4
- 192.203.230.10
- IPv6
- 2001:500:a8::e
IPv6AnycastGlobal
F-Root
Online- Operator
- Internet Systems Consortium
- IPv4
- 192.5.5.241
- IPv6
- 2001:500:2f::f
IPv6AnycastGlobal