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

Results for*.media.dev.ultraimpression.dev

Logged At	Not Before	Not After	Common Name	Matching Identities	Issuer Name
2020-05-19T04:47:27.542	2020-05-19T03:47:27	2020-08-17T03:47:27	*.dev.ultraimpression.dev	*.media.dev.ultraimpression.dev	C=US, O=Let's Encrypt, CN=Let's Encrypt Authority X3
2020-05-19T04:47:27.542	2020-05-19T03:47:27	2020-08-17T03:47:27	*.dev.ultraimpression.dev	*.media.dev.ultraimpression.dev	C=US, O=Let's Encrypt, CN=Let's Encrypt Authority X3
2020-05-19T04:47:27.38	2020-05-19T03:47:27	2020-08-17T03:47:27	*.dev.ultraimpression.dev	*.media.dev.ultraimpression.dev	C=US, O=Let's Encrypt, CN=Let's Encrypt Authority X3
2020-05-19T04:47:27.38	2020-05-19T03:47:27	2020-08-17T03:47:27	*.dev.ultraimpression.dev	*.media.dev.ultraimpression.dev	C=US, O=Let's Encrypt, CN=Let's Encrypt Authority X3