Domain Name System (DNS)






Load of the root servers; more statistics and details

"[NSI] is installing multiple Sun Microsystems E-10000 and 4500 enterprise servers with the capacity to handle millions of simultaneous transactions. 'The amount of traffic that we are getting has required us to literally double the number of servers every six months,' said Dave Holtzman, senior vice president of engineering at Network Solutions. Holtzman said the company's Whois server, which holds the names and addresses of domain name owners, gets as many as 40 million hits a month, while the main domain root server gets as many as 3,000 hits a second." (NYT, May 7, 1999 )

The GTLD are on different servers:

; <<>> DiG 8.2 <<>> ns com. 
;; res options: init recurs defnam dnsrch
;; got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 4
;; flags: qr rd ra; QUERY: 1, ANSWER: 12, AUTHORITY: 0, ADDITIONAL: 12
;;      com, type = NS, class = IN

com.                    4d18h29m6s IN NS  I.GTLD-SERVERS.NET.
com.                    4d18h29m6s IN NS  B.GTLD-SERVERS.NET.
com.                    4d18h29m6s IN NS  D.GTLD-SERVERS.NET.
com.                    4d18h29m6s IN NS  A.ROOT-SERVERS.NET.
com.                    4d18h29m6s IN NS  E.GTLD-SERVERS.NET.
com.                    4d18h29m6s IN NS  F.GTLD-SERVERS.NET.
com.                    4d18h29m6s IN NS  J.GTLD-SERVERS.NET.
com.                    4d18h29m6s IN NS  K.GTLD-SERVERS.NET.
com.                    4d18h29m6s IN NS  A.GTLD-SERVERS.NET.
com.                    4d18h29m6s IN NS  M.GTLD-SERVERS.NET.
com.                    4d18h29m6s IN NS  G.GTLD-SERVERS.NET.
com.                    4d18h29m6s IN NS  C.GTLD-SERVERS.NET.

I.GTLD-SERVERS.NET.     5d30m32s IN A
B.GTLD-SERVERS.NET.     4d15h51m32s IN A
D.GTLD-SERVERS.NET.     5d30m32s IN A
A.ROOT-SERVERS.NET.     5d30m32s IN A
E.GTLD-SERVERS.NET.     5d30m32s IN A
F.GTLD-SERVERS.NET.     5d30m32s IN A
J.GTLD-SERVERS.NET.     5d30m32s IN A
K.GTLD-SERVERS.NET.     5d30m32s IN A
A.GTLD-SERVERS.NET.     21h24m18s IN A
M.GTLD-SERVERS.NET.     5d30m32s IN A
G.GTLD-SERVERS.NET.     5d30m32s IN A
C.GTLD-SERVERS.NET.     5d30m32s IN A
mil 20KB
root-zone 90KB
gov 117KB
edu 880KB 13MB
net 19MB
org 19MB
com 228MB
(, March 1, 1998)

For Germany, these include:,


Outsourced Services

Last updated by Henning Schulzrinne