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

Results for*.partyalone.com

Logged At	Not Before	Not After	Common Name	Matching Identities	Issuer Name
2021-05-23T18:15:40.31	2021-05-10T00:00:00	2022-05-10T23:59:59	partyalone.com	*.partyalone.com	C=US, O=DigiCert Inc, OU=www.digicert.com, CN=Encryption Everywhere DV TLS CA - G1
2021-05-23T18:15:40.31	2021-05-10T00:00:00	2022-05-10T23:59:59	partyalone.com	*.partyalone.com	C=US, O=DigiCert Inc, OU=www.digicert.com, CN=Encryption Everywhere DV TLS CA - G1
2021-05-10T17:36:32.401	2021-05-10T00:00:00	2022-05-10T23:59:59	partyalone.com	*.partyalone.com	C=US, O=DigiCert Inc, OU=www.digicert.com, CN=Encryption Everywhere DV TLS CA - G1
2021-05-10T17:36:32.401	2021-05-10T00:00:00	2022-05-10T23:59:59	partyalone.com	*.partyalone.com	C=US, O=DigiCert Inc, OU=www.digicert.com, CN=Encryption Everywhere DV TLS CA - G1