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

Results for*.filevilla.com

Logged At	Not Before	Not After	Common Name	Matching Identities	Issuer Name
2019-03-07T12:09:17.214	2019-03-07T11:09:16	2019-06-05T11:09:16	chicagoabc7.com	*.filevilla.com	C=US, O=Let's Encrypt, CN=Let's Encrypt Authority X3
2019-03-07T12:09:17.214	2019-03-07T11:09:16	2019-06-05T11:09:16	chicagoabc7.com	*.filevilla.com	C=US, O=Let's Encrypt, CN=Let's Encrypt Authority X3
2019-03-07T12:09:16.27	2019-03-07T11:09:16	2019-06-05T11:09:16	chicagoabc7.com	*.filevilla.com	C=US, O=Let's Encrypt, CN=Let's Encrypt Authority X3
2019-03-07T12:09:16.27	2019-03-07T11:09:16	2019-06-05T11:09:16	chicagoabc7.com	*.filevilla.com	C=US, O=Let's Encrypt, CN=Let's Encrypt Authority X3
2019-01-21T10:44:17.051	2019-01-21T09:44:16	2019-04-21T09:44:16	filevilla.com	*.filevilla.com	C=US, O=Let's Encrypt, CN=Let's Encrypt Authority X3
2019-01-21T10:44:17.051	2019-01-21T09:44:16	2019-04-21T09:44:16	filevilla.com	*.filevilla.com	C=US, O=Let's Encrypt, CN=Let's Encrypt Authority X3
2019-01-21T10:44:16.097	2019-01-21T09:44:16	2019-04-21T09:44:16	filevilla.com	*.filevilla.com	C=US, O=Let's Encrypt, CN=Let's Encrypt Authority X3
2019-01-21T10:44:16.097	2019-01-21T09:44:16	2019-04-21T09:44:16	filevilla.com	*.filevilla.com	C=US, O=Let's Encrypt, CN=Let's Encrypt Authority X3