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

Results forhostmaster.nembu.com

Logged At	Not Before	Not After	Common Name	Matching Identities	Issuer Name
2025-11-09T20:38:30.255	2025-11-09T19:39:59	2026-02-07T19:39:58	hostmaster.nembu.com	hostmaster.nembu.com	C=US, O=Let's Encrypt, CN=R12
2025-11-09T20:38:30.058	2025-11-09T19:39:59	2026-02-07T19:39:58	hostmaster.nembu.com	hostmaster.nembu.com	C=US, O=Let's Encrypt, CN=R12
2023-01-17T17:29:29.892	2023-01-17T16:29:29	2023-04-17T16:29:28	nembu.com	*.nembu.com	C=US, O=Let's Encrypt, CN=R3
2023-01-17T17:29:29.56	2023-01-17T16:29:29	2023-04-17T16:29:28	nembu.com	*.nembu.com	C=US, O=Let's Encrypt, CN=R3
2022-11-18T15:30:38.113	2022-11-18T14:30:37	2023-02-16T14:30:36	nembu.com	*.nembu.com	C=US, O=Let's Encrypt, CN=R3
2022-11-18T15:30:37.807	2022-11-18T14:30:37	2023-02-16T14:30:36	nembu.com	*.nembu.com	C=US, O=Let's Encrypt, CN=R3