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

Results for*.ercool.passivecoder.com

Logged At	Not Before	Not After	Common Name	Matching Identities	Issuer Name
2025-02-17T16:54:58.837	2025-02-17T15:56:28	2025-05-18T15:56:27	*.ercool.passivecoder.com	*.ercool.passivecoder.com	C=US, O=Let's Encrypt, CN=R11
2025-02-17T16:54:58.837	2025-02-17T15:56:28	2025-05-18T15:56:27	*.ercool.passivecoder.com	*.ercool.passivecoder.com	C=US, O=Let's Encrypt, CN=R11
2025-02-17T16:54:58.573	2025-02-17T15:56:28	2025-05-18T15:56:27	*.ercool.passivecoder.com	*.ercool.passivecoder.com	C=US, O=Let's Encrypt, CN=R11
2025-02-17T16:54:58.573	2025-02-17T15:56:28	2025-05-18T15:56:27	*.ercool.passivecoder.com	*.ercool.passivecoder.com	C=US, O=Let's Encrypt, CN=R11