There are only 13 routed DNS servers in the world. Among the 13 routed servers, the names are "A" to "M", of which 10 are set in the United States, and one is set in the United Kingdom, Sweden and Japan. The following table shows the management units, settings locations and latest IP addresses of these machines. Among them, the IP address and other reference the "" file:
Name management unit and setting location IP address
A (Virginia, United States) 198.41.0.4
B Institute of Information Sciences (USA, California) 128.9.0.107
C PSINet Corporation (USA, Virginia) 192.33.4.12
D University of Maryland (Maryland, USA) 128.8.10.90
E NASA (California, USA) 192.203.230.10
F Internet Software Alliance (California, USA) 192.5.5.241
G U.S. Department of Defense Cyber Information Center (Virginia, USA) 192.112.36.4
H U.S. Army Institute (Maryland, USA) 128.63.2.53
I Autonomica (Stockholm, Sweden) 192.36.148.17
J VeriSign (Virginia, United States) 192.58.128.30
K RIPE NCC (UK, London) 193.0.14.129
L IANA (Virginia, United States) 198.32.64.12
M WIDE Project (Japan, Tokyo) 202.12.27.33
Article entry: aaadxmm Editor in charge: aaadxmm