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

Results fordata-dev.us.proranked.com

Logged At	Not Before	Not After	Common Name	Matching Identities	Issuer Name
2022-12-01T20:05:43.598	2022-12-01T00:00:00	2023-06-01T23:59:59	data-dev.us.proranked.com	data-dev.us.proranked.com	C=US, O="DigiCert, Inc.", CN=GeoTrust Global TLS RSA4096 SHA256 2022 CA1
2022-12-01T14:11:00.184	2022-12-01T00:00:00	2023-06-01T23:59:59	data-dev.us.proranked.com	data-dev.us.proranked.com	C=US, O="DigiCert, Inc.", CN=GeoTrust Global TLS RSA4096 SHA256 2022 CA1
2022-06-29T04:16:56.775	2022-06-29T00:00:00	2022-12-29T23:59:59	data-dev.us.proranked.com	data-dev.us.proranked.com	C=US, O="DigiCert, Inc.", CN=GeoTrust Global TLS RSA4096 SHA256 2022 CA1
2022-06-29T03:23:19.343	2022-06-29T00:00:00	2022-12-29T23:59:59	data-dev.us.proranked.com	data-dev.us.proranked.com	C=US, O="DigiCert, Inc.", CN=GeoTrust Global TLS RSA4096 SHA256 2022 CA1