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

Results for*.handsome.dog

Logged At	Not Before	Not After	Common Name	Matching Identities	Issuer Name
2021-09-01T07:55:53.794	2021-09-01T06:55:53	2021-11-30T06:55:52	handsome.dog	*.handsome.dog	C=US, O=Let's Encrypt, CN=R3
2021-09-01T07:55:53.794	2021-09-01T06:55:53	2021-11-30T06:55:52	handsome.dog	*.handsome.dog	C=US, O=Let's Encrypt, CN=R3
2021-09-01T07:55:53.54	2021-09-01T06:55:53	2021-11-30T06:55:52	handsome.dog	*.handsome.dog	C=US, O=Let's Encrypt, CN=R3
2021-09-01T07:55:53.54	2021-09-01T06:55:53	2021-11-30T06:55:52	handsome.dog	*.handsome.dog	C=US, O=Let's Encrypt, CN=R3
2016-11-20T23:28:17.456	2016-11-18T00:00:00	2017-05-21T23:59:59	sni87566.cloudflaressl.com	*.handsome.dog	C=GB, ST=Greater Manchester, L=Salford, O=COMODO CA Limited, CN=COMODO ECC Domain Validation Secure Server CA 2
2016-11-20T23:28:17.456	2016-11-18T00:00:00	2017-05-21T23:59:59	sni87566.cloudflaressl.com	*.handsome.dog	C=GB, ST=Greater Manchester, L=Salford, O=COMODO CA Limited, CN=COMODO ECC Domain Validation Secure Server CA 2