The first website went online in August 1991 and, now 15 years later, the 100-million website mark has been cracked.
Internet monitoring company Netcraft, which has explored the internet since 1995, said there were now 101,435,253 websites online, up from 97.9 million last month.
"The 100-million site milestone caps an extraordinary year in which the internet has already added 27.4 million sites, easily topping the previous full-year growth record of 17 million from 2005," Netcraft said.
The figures are derived from the number of responses to Netcraft's monthly survey, it said.
In the first Netcraft survey, conducted in August 1995, 18,957 sites were found.
According to web traffic monitor Alexa, Google's Australian and US homepages are the top two most popular sites among Australians, followed by Yahoo, MSN, eBay and MySpace.
The first website went online in August 1991, and provided a description of the World Wide Web as well as technical support details.
An archived version of the first website can be found here: