The most recent Verisign Domain Industry Brief, for Q2 2018, shows continued strong .com registration. The last time we checked this, the Q4 2017 report showed that 131.9 million .com domains had been registered as of December 31, 2017.
The updated figure as of June 30, 2018, shows that 135.6 million .com domains were registered. The prior quarter, ending March 31, 2018, ended with 133.9 million. Both of these quarters showed strong .com registration as compared with the prior year. DNPedia states that .com domains registered as of today is 137.1 million, which would suggest that the registration rate has slowed somewhat in the Q3 and Q4 2018.
Here are the updated totals so you can see how the rate of increase in recent quarters compares to the historical figures:
135.6 Q2 2018 1.27%
133.9 Q1 2018 1.52%
131.9 Q4 2017 0.84%
130.8 Q3 2017 1.24%
129.2 Q2 2017 0.62%
128.4 Q1 2017 1.18%
126.9 Q4 2016 -1.17%
128.4 Q3 2016 0.71%
127.5 Q2 2016 0.71%
126.6 Q1 2016 2.10%
124 Q4 2015 3.25%
120.1 Q3 2015 1.35%
118.5 Q2 2015 0.59%
117.8 Q1 2015 1.90%
115.6 Q4 2014 0.61%
114.9 Q3 2014 1.06%
113.7 Q2 2014 0.44%
113.2 Q1 2014 1.07%
112 Q4 2013