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

Results fordrone-dev.mk1technology.com

Logged At	Not Before	Not After	Common Name	Matching Identities	Issuer Name
2023-08-23T10:43:20.451	2023-08-23T09:43:20	2023-11-21T09:43:19	drone-dev.mk1technology.com	drone-dev.mk1technology.com	C=US, O=Let's Encrypt, CN=R3
2023-08-23T10:43:20.292	2023-08-23T09:43:20	2023-11-21T09:43:19	drone-dev.mk1technology.com	drone-dev.mk1technology.com	C=US, O=Let's Encrypt, CN=R3
2023-05-10T15:16:20.272	2023-05-10T14:16:19	2023-08-08T14:16:18	drone-dev.mk1technology.com	drone-dev.mk1technology.com	C=US, O=Let's Encrypt, CN=R3
2023-05-10T15:16:19.972	2023-05-10T14:16:19	2023-08-08T14:16:18	drone-dev.mk1technology.com	drone-dev.mk1technology.com	C=US, O=Let's Encrypt, CN=R3