DNS Root Servers

The DNS root servers are thirteen DNS server clusters which are responsible for delegating DNS requests to the top level domain (TLD) nameservers.

The DNS Root Servers

A.ROOT-SERVERS.NET.

Operator: VeriSign Naming and Directory Services
IP Address: 198.41.0.4

B.ROOT-SERVERS.NET.

Operator: Information Sciences Institute
IP Address: 192.228.79.201

C.ROOT-SERVERS.NET.

Operator: Cogent Communications
IP Address: 192.33.4.12

D.ROOT-SERVERS.NET.

Operator: University of Maryland
IP Address: 128.8.10.90

E.ROOT-SERVERS.NET.

Operator: NASA Ames Research Center
IP Address: 192.203.230.10

F.ROOT-SERVERS.NET.

Operator: Internet Systems Consortium, Inc.
IP Address: 192.5.5.241

G.ROOT-SERVERS.NET.

Operator: U.S. DOD Network Information Center
IP Address: 192.112.36.4

H.ROOT-SERVERS.NET.

Operator: Autonomica/NORDUnet
IP Address: 128.63.2.53

I.ROOT-SERVERS.NET.

Operator: Autonomica/NORDUnet
IP Address: 192.36.148.17

J.ROOT-SERVERS.NET.

Operator: VeriSign Naming and Directory Services
IP Address: 192.58.128.30

K.ROOT-SERVERS.NET.

Operator: Reseaux IP Europeens - Network Coordination Centre
IP Address: 193.0.14.129

L.ROOT-SERVERS.NET.

Operator: Internet Corporation for Assigned Names and Numbers
IP Address: 198.32.64.12

M.ROOT-SERVERS.NET.

Operator: WIDE Project
IP Address: 202.12.27.33

The DNS root servers have not been changed between 29 January, 2004 and today -- 22 November, 2006.

To view the canonical list of current DNS root servers, view the named.root file at Internic.

Related Articles on DNS

• What is DNS?
• How do I flush DNS?
• How do I find my DNS servers?
• What are public DNS servers?
• How do I perform a DNS lookup?
• What is reverse DNS?
• What is a dynamic DNS?
• What are DNS root servers?
• Understanding DNS