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

Results for*.app.castingnetworks.com

Logged At	Not Before	Not After	Common Name	Matching Identities	Issuer Name
2020-10-25T15:36:14.228	2020-09-21T00:00:00	2021-10-21T12:00:00	app.castingnetworks.com	*.app.castingnetworks.com	C=US, O=Amazon, OU=Server CA 1B, CN=Amazon
2020-10-25T15:36:14.228	2020-09-21T00:00:00	2021-10-21T12:00:00	app.castingnetworks.com	*.app.castingnetworks.com	C=US, O=Amazon, OU=Server CA 1B, CN=Amazon
2020-09-21T19:24:01.524	2020-09-21T00:00:00	2021-10-21T12:00:00	app.castingnetworks.com	*.app.castingnetworks.com	C=US, O=Amazon, OU=Server CA 1B, CN=Amazon
2020-09-21T19:24:01.524	2020-09-21T00:00:00	2021-10-21T12:00:00	app.castingnetworks.com	*.app.castingnetworks.com	C=US, O=Amazon, OU=Server CA 1B, CN=Amazon
2020-05-05T22:15:30.916	2020-05-05T00:00:00	2021-06-05T12:00:00	app.castingnetworks.com	*.app.castingnetworks.com	C=US, O=Amazon, OU=Server CA 1B, CN=Amazon
2020-05-05T22:15:30.916	2020-05-05T00:00:00	2021-06-05T12:00:00	app.castingnetworks.com	*.app.castingnetworks.com	C=US, O=Amazon, OU=Server CA 1B, CN=Amazon