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

Results forhostmaster.hostmaster.degustify.com

Logged At	Not Before	Not After	Common Name	Matching Identities	Issuer Name
2021-05-16T00:59:10.286	2021-05-15T23:59:10	2021-08-13T23:59:10	hostmaster.hostmaster.hostmaster.degustify.com	hostmaster.hostmaster.hostmaster.degustify.com	C=US, O=Let's Encrypt, CN=R3
2021-05-16T00:59:10.179	2021-05-15T23:59:10	2021-08-13T23:59:10	hostmaster.hostmaster.hostmaster.degustify.com	hostmaster.hostmaster.hostmaster.degustify.com	C=US, O=Let's Encrypt, CN=R3
2021-02-15T02:27:31.05	2021-02-15T01:27:30	2021-05-16T01:27:30	hostmaster.hostmaster.degustify.com	hostmaster.hostmaster.degustify.com	C=US, O=Let's Encrypt, CN=R3
2021-02-15T02:27:30.357	2021-02-15T01:27:30	2021-05-16T01:27:30	hostmaster.hostmaster.degustify.com	hostmaster.hostmaster.degustify.com	C=US, O=Let's Encrypt, CN=R3
2021-02-15T02:24:33.155	2021-02-15T01:24:33	2021-05-16T01:24:33	hostmaster.hostmaster.hostmaster.degustify.com	hostmaster.hostmaster.hostmaster.degustify.com	C=US, O=Let's Encrypt, CN=R3
2021-02-15T02:24:33.031	2021-02-15T01:24:33	2021-05-16T01:24:33	hostmaster.hostmaster.hostmaster.degustify.com	hostmaster.hostmaster.hostmaster.degustify.com	C=US, O=Let's Encrypt, CN=R3