From Netcrafts survey, the first Web Server Survey ran in August 1995 and found 18,957 sites. NCSA and CERN were the leading web servers of the day, in front of Netscape which had recently IPO’d, and the Apache project which started a few months earlier in March 1995. Microsoft-IIS, HTTP/1.1 hosting and domain name registrars were not then on the horizon.
In the August 2003 survey we received responses from 42,807,275 sites.
(My first domain appeared in March 1999) although I was using geocities a longtime before that.