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

Results fornet.cloudstorage.vc

Logged At	Not Before	Not After	Common Name	Matching Identities	Issuer Name
2023-05-04T21:19:48.027	2023-05-04T20:19:47	2023-08-02T20:19:46	petwalker.net.cloudstorage.vc	petwalker.net.cloudstorage.vc	C=US, O=Let's Encrypt, CN=R3
2023-05-04T21:19:47.8	2023-05-04T20:19:47	2023-08-02T20:19:46	petwalker.net.cloudstorage.vc	petwalker.net.cloudstorage.vc	C=US, O=Let's Encrypt, CN=R3
2022-08-02T08:52:16.959	2022-08-02T07:52:16	2022-10-31T07:52:15	crochetpartners.net.cloudstorage.vc	crochetpartners.net.cloudstorage.vc	C=US, O=Let's Encrypt, CN=R3
2022-08-02T08:52:16.837	2022-08-02T07:52:16	2022-10-31T07:52:15	crochetpartners.net.cloudstorage.vc	crochetpartners.net.cloudstorage.vc	C=US, O=Let's Encrypt, CN=R3