Websites online right now
After reaching 1 billion websites in September of 2014, a milestone confirmed by NetCraft in its October 2014 Web Server Survey and that Internet Live Stats was the first to announce - as attested by this tweet from the inventor of the World Wide Web himself, Tim Berners-Lee - the number of websites in the world has subsequently declined, reverting back to a level below 1 billion. This is due to the monthly fluctuations in the count of inactive websites. We do expect, however, to exceed 1 billion websites again sometime from late 2015 to mid 2016, and to stabilize the count above this historic milestone in 2017. From 1 website in 1991 to 1 billion in 2014, the chart and table below show the total number of websites by year throughout history:
By "Website" we mean unique hostname (a name which can be resolved, using a name server, into an IP Address).
It must be noted that around 75% of websites today are not active, but parked domains or similar. 
|Websites||Change||Internet Users||Users per|
|1995||23,500||758%||44,838,900||1,908||Altavista, Amazon, AuctionWeb|
|Aug. 1991||1||World Wide Web Project|
* estimate for July 1, 2014
Note: Each year's data for "Websites" refers to the total number at the end of June (mid-year)
Source: NetCraft and Internet Live Stats (elaboration of data by Matthew Gray of MIT and Hobbes' Internet Timeline and Pingdom)
Periodic drops in the total count can depend on various factors, including an improvement in NetCraft's handling of wildcard hostnames. For example, in August 2012, over 40 million hostnames on only 242 IP addresses were removed from the Survey.