How Many Domains Does The Internet Have?

210 Million. According to Verisign.

"According to a new Domain Name Industry Brief from VeriSign at the end of the first quarter of 2011 the total number of top-level domains registered around the world was over 209.8 million, an increase of 4.5 million (or 2.2 percent) over the fourth quarter alone. Overall, domain registrations grew by 7.9 percent (15.3 million) during the last year.

For the year, the ten largest top-level domains in order were .com, .de, .net, .uk, .org, .info, .nl, .eu, .cn, and .ru. Although there are more than 240 top-level domains in use around the world, some 61 percent of all registrations in the last year were in those top ten domains."

Statistics Source: DigitalTrends