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

Results fortest.masterdon.com

Logged At	Not Before	Not After	Common Name	Matching Identities	Issuer Name
2025-10-01T17:39:54.595	2025-10-01T16:41:23	2025-12-30T16:41:22	test.masterdon.com	test.masterdon.com	C=US, O=Let's Encrypt, CN=R13
2025-10-01T17:39:54.163	2025-10-01T16:41:23	2025-12-30T16:41:22	test.masterdon.com	test.masterdon.com	C=US, O=Let's Encrypt, CN=R13
2023-01-17T18:07:31.348	2023-01-17T17:07:31	2023-04-17T17:07:30	masterdon.com	*.masterdon.com	C=US, O=Let's Encrypt, CN=R3
2023-01-17T18:07:31.167	2023-01-17T17:07:31	2023-04-17T17:07:30	masterdon.com	*.masterdon.com	C=US, O=Let's Encrypt, CN=R3
2022-11-18T16:06:12.873	2022-11-18T15:06:11	2023-02-16T15:06:10	masterdon.com	*.masterdon.com	C=US, O=Let's Encrypt, CN=R3
2022-11-18T16:06:12.192	2022-11-18T15:06:11	2023-02-16T15:06:10	masterdon.com	*.masterdon.com	C=US, O=Let's Encrypt, CN=R3