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

Results forbeta.bluggie.com

Logged At	Not Before	Not After	Common Name	Matching Identities	Issuer Name
2020-10-22T12:57:49.361	2020-10-22T11:57:49	2021-01-20T11:57:49	beta.bluggie.com	beta.bluggie.com	C=US, O=Let's Encrypt, CN=Let's Encrypt Authority X3
2020-10-22T12:57:49.131	2020-10-22T11:57:49	2021-01-20T11:57:49	beta.bluggie.com	beta.bluggie.com	C=US, O=Let's Encrypt, CN=Let's Encrypt Authority X3
2020-10-22T12:51:41.381	2020-10-22T11:51:41	2021-01-20T11:51:41	beta.bluggie.com	beta.bluggie.com	C=US, O=Let's Encrypt, CN=Let's Encrypt Authority X3
2020-10-22T12:51:41.169	2020-10-22T11:51:41	2021-01-20T11:51:41	beta.bluggie.com	beta.bluggie.com	C=US, O=Let's Encrypt, CN=Let's Encrypt Authority X3
2020-08-23T14:43:29.817	2020-08-23T13:43:29	2020-11-21T13:43:29	beta.bluggie.com	beta.bluggie.com	C=US, O=Let's Encrypt, CN=Let's Encrypt Authority X3
2020-08-23T14:43:29.632	2020-08-23T13:43:29	2020-11-21T13:43:29	beta.bluggie.com	beta.bluggie.com	C=US, O=Let's Encrypt, CN=Let's Encrypt Authority X3
2020-08-23T14:41:54.062	2020-08-23T13:41:53	2020-11-21T13:41:53	beta.bluggie.com	beta.bluggie.com	C=US, O=Let's Encrypt, CN=Let's Encrypt Authority X3
2020-08-23T14:41:53.902	2020-08-23T13:41:53	2020-11-21T13:41:53	beta.bluggie.com	beta.bluggie.com	C=US, O=Let's Encrypt, CN=Let's Encrypt Authority X3