As you know that number of websites are increasing very fast in exponential order. The graph shows actually how many websites have been registered.
This is a real big number. In the last one year, no. of websites have almost doubled. Now here is an online tool called
which is really cool way to find how many domain name have been registered separately for .com, .net, .org, .info etc… It shows complete statistics. It is regularly updated website. It also provide information about how many IP’s are being used that signifies number of internet users as per different countries.