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

Results for*.howmanytrees.app

Logged At	Not Before	Not After	Common Name	Matching Identities	Issuer Name
2019-11-09T09:17:26.051	2019-04-15T00:00:00	2020-04-15T12:00:00	sni.cloudflaressl.com	*.howmanytrees.app	C=US, ST=CA, L=San Francisco, O="CloudFlare, Inc.", CN=CloudFlare Inc ECC CA-2
2019-11-09T09:17:26.051	2019-04-15T00:00:00	2020-04-15T12:00:00	sni.cloudflaressl.com	*.howmanytrees.app	C=US, ST=CA, L=San Francisco, O="CloudFlare, Inc.", CN=CloudFlare Inc ECC CA-2
2019-04-15T16:04:02.048	2019-04-15T00:00:00	2020-04-15T12:00:00	sni.cloudflaressl.com	*.howmanytrees.app	C=US, ST=CA, L=San Francisco, O="CloudFlare, Inc.", CN=CloudFlare Inc ECC CA-2
2019-04-15T16:04:02.048	2019-04-15T00:00:00	2020-04-15T12:00:00	sni.cloudflaressl.com	*.howmanytrees.app	C=US, ST=CA, L=San Francisco, O="CloudFlare, Inc.", CN=CloudFlare Inc ECC CA-2