It can be anything! An apex, subdomain, or even a URL.

Results for*.nsrsc.com

Logged At	Not Before	Not After	Common Name	Matching Identities	Issuer Name
2019-12-01T18:46:50.199	2019-11-24T00:00:00	2020-10-09T12:00:00	sni.cloudflaressl.com	*.nsrsc.com	C=US, ST=CA, L=San Francisco, O="CloudFlare, Inc.", CN=CloudFlare Inc ECC CA-2
2019-12-01T18:46:50.199	2019-11-24T00:00:00	2020-10-09T12:00:00	sni.cloudflaressl.com	*.nsrsc.com	C=US, ST=CA, L=San Francisco, O="CloudFlare, Inc.", CN=CloudFlare Inc ECC CA-2
2019-11-24T02:17:27.086	2019-11-24T00:00:00	2020-10-09T12:00:00	sni.cloudflaressl.com	*.nsrsc.com	C=US, ST=CA, L=San Francisco, O="CloudFlare, Inc.", CN=CloudFlare Inc ECC CA-2
2019-11-24T02:17:27.086	2019-11-24T00:00:00	2020-10-09T12:00:00	sni.cloudflaressl.com	*.nsrsc.com	C=US, ST=CA, L=San Francisco, O="CloudFlare, Inc.", CN=CloudFlare Inc ECC CA-2