Verisign has released their latest quarterly Domain Name Industry Brief covering the 3rd quarter of 2015.The administrator of the .com and .net registries reported that 299 million domain names were registered across all extensions at the end of 3Q-2015. That is 14.8 million more domains than the number registered at the same point a year ago, a healthy 5.2% jump year over year. 3.1 million domains were added in 3Q-2015, a  1.1% rise from the previous quarter.  

Verisign's .com and .net TLDs when combined accounted for 135.2 million of the names registered at the end of 3Q-2015, a 3.4% increase year over year. 120.1 million of those were .coms - the world's most popular TLD. 15.1 million were .nets.

Total country-code TLD (ccTLD) registrations were approximately 137.8 million names at the end of 3Q-2015. That was a 4.3% rise year over year but the number was a slight decrease (minus one-tenth of 1%) from the previous quarter. There was a clear reason for that. The number of .ar domains (Argentina's country code) fell from 2.7 million to just 700,000 after NIC-Argentina starting charging fees to register .ar domains. They had previously been free of charge for both registrations and renewals. 

The Verisign Domain Name Industry Brief is available in both downloadable .pdf and infographic form. You can access both here.