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

Results forold.changes.in

Logged At	Not Before	Not After	Common Name	Matching Identities	Issuer Name
2021-08-09T04:52:57.69	2021-08-09T03:52:57	2021-11-07T03:52:55	old.changes.in	old.changes.in	C=US, O=Let's Encrypt, CN=R3
2021-08-09T04:52:57.289	2021-08-09T03:52:57	2021-11-07T03:52:55	old.changes.in	old.changes.in	C=US, O=Let's Encrypt, CN=R3
2021-04-02T23:51:32.798	2021-04-02T22:51:32	2021-07-01T22:51:32	old.changes.in	old.changes.in	C=US, O=Let's Encrypt, CN=R3
2021-04-02T23:51:32.559	2021-04-02T22:51:32	2021-07-01T22:51:32	old.changes.in	old.changes.in	C=US, O=Let's Encrypt, CN=R3
2021-03-25T21:33:48.11	2021-03-25T20:33:47	2021-06-23T20:33:47	changes.in	*.changes.in	C=US, O=Let's Encrypt, CN=R3
2021-03-25T21:33:47.497	2021-03-25T20:33:47	2021-06-23T20:33:47	changes.in	*.changes.in	C=US, O=Let's Encrypt, CN=R3