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There are currently 13 root name servers, with names in the form letter.root-servers.org where letter ranges from A to M but C, F, I, J, K and M servers now exist in multiple locations on different continents:

Letter

Old name

Operator

Location

A

ns.internic.net

VeriSign

Dulles, Virginia, USA

B

ns1.isi.edu

ISI

Marina Del Rey, California, USA

C

c.psi.net

Cogent Communications

Washington, D.C.

D

terp.umd.edu

University of Maryland

College Park, Maryland, USA

E

ns.nasa.gov

NASA

Mountain View, California, USA

F

ns.isc.org

ISC

St Redwood City, CA, USA

G

ns.nic.ddn.mil

U.S. DoD NIC

Columbus, Ohio, USA

H

aos.arl.army.mil

U.S. Army Research Lab

Aberdeen Proving Ground, Maryland, USA

I

nic.nordu.net

Autonomica

located in Stockholm

J


VeriSign

Herndon, Virginia,USA

K


RIPE NCC

located in London

L


ICANN

Los Angeles, California, USA

M


WIDE Project

located in Tokyo

  • Internet Corporation for Assigned Names and Numbers (ICANN)
  • "G" server owned by the U.S. Department of Defense Network Information Center in Vienna.
  • Cogent is controversial in the ISP market because of its highly competitive prices, and because it has been depeered on more than one occasion by other ISPs such as AOL, France Telecom and Level 3.
  • In January 2004 the projects, assets and staff of Internet Software Consortium were transferred to a new company, Internet Systems Consortium. ISC also operates a root DNS server (F-root) and maintains the central list of moderators for Usenet.

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