"As of March 31, 2024, we had 172.5 million .com and .net registrations in the domain name base."
https://investor.verisign.com/static-files/2412702e-e744-485...
"1865 instances operated by the 12 independent root server operators."
Verisign maintains root servers at 209 locations. ("A" and "J") https://root-servers.org/
Latency https://a.root-servers.org/metrics
13 root servers https://www.iana.org/domains/root/servers