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

Results for*.atechsky.com

Logged At	Not Before	Not After	Common Name	Matching Identities	Issuer Name
2019-10-18T11:55:07.815	2019-10-17T00:00:00	2020-10-09T12:00:00	sni.cloudflaressl.com	*.atechsky.com	C=US, ST=CA, L=San Francisco, O="CloudFlare, Inc.", CN=CloudFlare Inc ECC CA-2
2019-10-18T11:55:07.815	2019-10-17T00:00:00	2020-10-09T12:00:00	sni.cloudflaressl.com	*.atechsky.com	C=US, ST=CA, L=San Francisco, O="CloudFlare, Inc.", CN=CloudFlare Inc ECC CA-2
2019-10-17T06:32:22.536	2019-10-17T00:00:00	2020-10-09T12:00:00	sni.cloudflaressl.com	*.atechsky.com	C=US, ST=CA, L=San Francisco, O="CloudFlare, Inc.", CN=CloudFlare Inc ECC CA-2
2019-10-17T06:32:22.536	2019-10-17T00:00:00	2020-10-09T12:00:00	sni.cloudflaressl.com	*.atechsky.com	C=US, ST=CA, L=San Francisco, O="CloudFlare, Inc.", CN=CloudFlare Inc ECC CA-2