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

Results for*.surzu.com

Logged At	Not Before	Not After	Common Name	Matching Identities	Issuer Name
2019-11-22T13:08:29.898	2019-11-22T00:00:00	2020-10-09T12:00:00	sni.cloudflaressl.com	*.surzu.com	C=US, ST=CA, L=San Francisco, O="CloudFlare, Inc.", CN=CloudFlare Inc ECC CA-2
2019-11-22T13:08:29.898	2019-11-22T00:00:00	2020-10-09T12:00:00	sni.cloudflaressl.com	*.surzu.com	C=US, ST=CA, L=San Francisco, O="CloudFlare, Inc.", CN=CloudFlare Inc ECC CA-2
2018-12-23T11:23:55.379	2018-12-23T00:00:00	2019-12-23T12:00:00	sni.cloudflaressl.com	*.surzu.com	C=US, ST=CA, L=San Francisco, O="CloudFlare, Inc.", CN=CloudFlare Inc ECC CA-2
2018-12-23T11:23:55.379	2018-12-23T00:00:00	2019-12-23T12:00:00	sni.cloudflaressl.com	*.surzu.com	C=US, ST=CA, L=San Francisco, O="CloudFlare, Inc.", CN=CloudFlare Inc ECC CA-2