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

Results forhostmaster.phoneexchanges.com

Logged At	Not Before	Not After	Common Name	Matching Identities	Issuer Name
2025-11-09T09:48:37.213	2025-11-09T08:50:04	2026-02-07T08:50:03	hostmaster.phoneexchanges.com	hostmaster.phoneexchanges.com	C=US, O=Let's Encrypt, CN=R13
2025-11-09T09:48:34.66	2025-11-09T08:50:04	2026-02-07T08:50:03	hostmaster.phoneexchanges.com	hostmaster.phoneexchanges.com	C=US, O=Let's Encrypt, CN=R13
2023-01-17T18:07:34.524	2023-01-17T17:07:33	2023-04-17T17:07:32	phoneexchanges.com	*.phoneexchanges.com	C=US, O=Let's Encrypt, CN=R3
2023-01-17T18:07:33.833	2023-01-17T17:07:33	2023-04-17T17:07:32	phoneexchanges.com	*.phoneexchanges.com	C=US, O=Let's Encrypt, CN=R3
2022-11-18T16:06:05.272	2022-11-18T15:06:04	2023-02-16T15:06:03	phoneexchanges.com	*.phoneexchanges.com	C=US, O=Let's Encrypt, CN=R3
2022-11-18T16:06:04.954	2022-11-18T15:06:04	2023-02-16T15:06:03	phoneexchanges.com	*.phoneexchanges.com	C=US, O=Let's Encrypt, CN=R3