Verisign released their DNIB report for the  third quarter of 2018.

 

• Q3 2018 closed with approximately 342.4 million domain name registrations across all top-level domains (TLDs), an increase of approximately 2.6 million domain name registrations, or 0.8 percent, compared to the second quarter of 2018.
• .com and .net TLDs had a combined total of approximately 151.7 million domain name registrations in the domain name base at the end of the third quarter of 2018, an increase of approximately 2.0 million domain name registrations, or 1.3 percent, compared to the second quarter of 2018.
• New gTLDs (ngTLDs) domain name registrations were approximately 23.4 million at the end of the third quarter of 2018, an increase of approximately 1.6 million domain name registrations, or 7.5 percent, compared to the second quarter of 2018.

You can find the full report here