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

Results for*.prod1a.domainengine.iddg.io

Logged At	Not Before	Not After	Common Name	Matching Identities	Issuer Name
2023-08-17T21:11:56.556	2023-08-17T00:00:00	2024-09-14T23:59:59	prod1a.domainengine.iddg.io	*.prod1a.domainengine.iddg.io	C=US, O=Amazon, CN=Amazon RSA 2048 M01
2023-08-17T21:11:56.556	2023-08-17T00:00:00	2024-09-14T23:59:59	prod1a.domainengine.iddg.io	*.prod1a.domainengine.iddg.io	C=US, O=Amazon, CN=Amazon RSA 2048 M01
2023-08-17T21:11:53.527	2023-08-17T00:00:00	2024-09-14T23:59:59	prod1a.domainengine.iddg.io	*.prod1a.domainengine.iddg.io	C=US, O=Amazon, CN=Amazon RSA 2048 M03
2023-08-17T21:11:53.527	2023-08-17T00:00:00	2024-09-14T23:59:59	prod1a.domainengine.iddg.io	*.prod1a.domainengine.iddg.io	C=US, O=Amazon, CN=Amazon RSA 2048 M03