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

Results for*.waterunity.com

Logged At	Not Before	Not After	Common Name	Matching Identities	Issuer Name
2019-08-21T19:52:55.808	2019-08-15T00:00:00	2020-08-14T12:00:00	sni.cloudflaressl.com	*.waterunity.com	C=US, ST=CA, L=San Francisco, O="CloudFlare, Inc.", CN=CloudFlare Inc ECC CA-2
2019-08-21T19:52:55.808	2019-08-15T00:00:00	2020-08-14T12:00:00	sni.cloudflaressl.com	*.waterunity.com	C=US, ST=CA, L=San Francisco, O="CloudFlare, Inc.", CN=CloudFlare Inc ECC CA-2
2019-08-15T13:48:54.885	2019-08-15T00:00:00	2020-08-14T12:00:00	sni.cloudflaressl.com	*.waterunity.com	C=US, ST=CA, L=San Francisco, O="CloudFlare, Inc.", CN=CloudFlare Inc ECC CA-2
2019-08-15T13:48:54.885	2019-08-15T00:00:00	2020-08-14T12:00:00	sni.cloudflaressl.com	*.waterunity.com	C=US, ST=CA, L=San Francisco, O="CloudFlare, Inc.", CN=CloudFlare Inc ECC CA-2