The first commercial Internet domain name, with .com extension was registered 15 March 1985 in the name of symbolics.com by Symbolics Inc., a computer systems firm in Cambridge, Massachusetts. By 1992, fewer than 15,000 .com domains had been registered.
By October 2009, 21 generic top-level domains (TLDs) and 250 two-letter country-code top-level domains existed.
According to Verisign, four million domain names were added to the Internet in the third quarter of 2014, bringing the total number of registered domain names to 284 million worldwide across all top-level domains as of Sept. 30, 2014.
The increase of four million domain names globally equates to a growth rate of 1.6 percent over the second quarter of 2014. Worldwide registrations have grown by 18.1 million, or 6.8 percent, year over year.