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

Results forsocket.pharge.com

Logged At	Not Before	Not After	Common Name	Matching Identities	Issuer Name
2024-12-02T17:41:15.854	2024-12-02T16:42:43	2025-03-02T16:42:42	socket.pharge.com	socket.pharge.com	C=US, O=Let's Encrypt, CN=R11
2024-12-02T17:41:13.598	2024-12-02T16:42:43	2025-03-02T16:42:42	socket.pharge.com	socket.pharge.com	C=US, O=Let's Encrypt, CN=R11
2020-02-16T18:59:42.322	2020-02-16T17:59:42	2020-05-16T17:59:42	api.pharge.com	socket.pharge.com	C=US, O=Let's Encrypt, CN=Let's Encrypt Authority X3
2020-02-16T18:59:42.12	2020-02-16T17:59:42	2020-05-16T17:59:42	api.pharge.com	socket.pharge.com	C=US, O=Let's Encrypt, CN=Let's Encrypt Authority X3
2020-02-16T16:30:04.337	2020-02-16T15:30:04	2020-05-16T15:30:04	app.pharge.com	socket.pharge.com	C=US, O=Let's Encrypt, CN=Let's Encrypt Authority X3
2020-02-16T16:30:04.16	2020-02-16T15:30:04	2020-05-16T15:30:04	app.pharge.com	socket.pharge.com	C=US, O=Let's Encrypt, CN=Let's Encrypt Authority X3