DNS誕生于1984年，1985年國際頂級域名被定義。最早的頂級域名是COM、ORG、EDU、GOV、MIL和ccTLD。

1985年4月，cmu.edu, purdue.edu, rice.edu 和 ucla.edu被注冊，它們是世界上最早注冊的域名。

第一個.gov域名是css.gov，被注冊于1985年6月。

第一個.org域名是mitre.org，被注冊于1985年7月。

第一個.com域名被注冊于1985年3月15日，這個域名是symbolics.com，這個域名至今可以訪問，不過沒有什么東西可看。

下面是最早注冊的100個.com域名：

SYMBOLICS.COM
BBN.COM
THINK.COM
MCC.COM
DEC.COM
NORTHROP.COM
XEROX.COM
SRI.COM
HP.COM
BELLCORE.COM
IBM.COM
SUN.COM
INTEL.COM
TI.COM
ATT.COM
GMR.COM
TEK.COM
FMC.COM
UB.COM
BELL-ATL.COM
GE.COM
GREBYN.COM
ISC.COM
NSC.COM
STARGATE.COM
BOEING.COM
ITCORP.COM
SIEMENS.COM
PYRAMID.COM
ALPHACDC.COM
BDM.COM
FLUKE.COM
INMET.COM
KESMAI.COM
MENTOR.COM
NEC.COM
RAY.COM
ROSEMOUNT.COM
VORTEX.COM
ALCOA.COM
GTE.COM
ADOBE.COM
AMD.COM
DAS.COM
DATA-IO.COM
OCTOPUS.COM
PORTAL.COM
TELTONE.COM
3COM.COM
AMDAHL.COM
CCUR.COM
CI.COM
CONVERGENT.COM
DG.COM
PEREGRINE.COM
QUAD.COM
SQ.COM
TANDY.COM
TTI.COM
UNISYS.COM
CGI.COM
CTS.COM
SPDCC.COM
APPLE.COM
NMA.COM
PRIME.COM
PH

ILIPS.COM
DATACUBE.COM
KAI.COM
TIC.COM
VINE.COM
NCR.COM
CISCO.COM
RDL.COM
SLB.COM
PARCPLACE.COM
UTC.COM
IDE.COM
TRW.COM
UNIPRESS.COM
DUPONT.COM
LOCKHEED.COM
ROSETTA.COM
TOAD.COM
QUICK.COM
ALLIED.COM
DSC.COM
SCO.COM
GENE.COM
KCCS.COM
SPECTRA.COM
WLK.COM
MENTAT.COM
WYSE.COM
CFG.COM
MARBLE.COM
CAYMAN.COM
ENTITY.COM
KSR.COM
NYNEXST.COM
 March 15 1985
April 24 1985
May 24 1985
July 11 1985
September 30 1985
November 7 1985
January 9 1986
January 17 1986
March 3 1986
March 5 1986
March 19 1986
March 19 1986
March 25 1986
March 25 1986
April 25 1986
May 8 1986
May 8 1986
July 10 1986
July 10 1986
August 5 1986
August 5 1986
August 5 1986
August 5 1986
August 5 1986
August 5 1986
September 2 1986
September 18 1986
September 29 1986
October 18 1986
October 27 1986
October 27 1986
October 27 1986
October 27 1986
October 27 1986
October 27 1986
October 27 1986
October 27 1986
October 27 1986
October 27 1986
November 5 1986
November 5 1986
November 17 1986
November 17 1986
November 17 1986
November 17 1986
November 17 1986
November 17 1986
November 17 1986
December 11 1986
Decemb

er 11 1986
December 11 1986
December 11 1986
December 11 1986
December 11 1986
December 11 1986
December 11 1986
December 11 1986
December 11 1986
December 11 1986
December 11 1986
January 19 1987
January 19 1987
January 19 1987
February 19 1987
March 4 1987
March 4 1987
April 4 1987
April 23 1987
April 23 1987
April 23 1987
April 23 1987
April 30 1987
May 14 1987
May 14 1987
May 20 1987
May 27 1987
May 27 1987
June 26 1987
July 9 1987
July 13 1987
July 27 1987
July 27 1987
July 28 1987
August 18 1987
August 31 1987
September 3 1987
September 3 1987
September 3 1987
September 22 1987
September 22 1987
September 22 1987
September 22 1987
September 30 1987
October 14 1987
November 2 1987
November 9 1987
November 16 1987
November 16 1987
November 24 1987
November 30 1987