The First Dot Com the Angels Did Say…
Hark ye Merry Makers, let us reflect on Dot Coms past…
What was the world’s first .com? … Now were sure many of you think you know and some really do know, but those that think it was think.com better think again, think.com was the third…we think.
The DNS was created in 1984 and in 1985 top level domains were defined. The first top level domains were COM, ORG, EDU, GOV, MIL and ccTLD.
In April 1985 cmu.edu, purdue.edu, rice.edu and ucla.edu were the first registered domain names.
Northrup.com is the first big name I spotted in the Top 100 list, it was registered November 7, 1985. See the full list here.

December 15th, 2007 at 1:08 pm
I always thaught that the first .com was dec.com
People at DEC (Digital Equipment Corporation, later known as Digital, currently part of Compaq) invented Ethernet and fulltext web search (altavista.digital.com) becoming important part of Internet history.