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

Results for*.s3-api.dal.objectstorage.adn.networklayer.com

Logged At	Not Before	Not After	Common Name	Matching Identities	Issuer Name
2018-06-25T19:25:03.534	2018-06-25T00:00:00	2019-08-02T12:00:00	s3-api.dal.objectstorage.adn.networklayer.com	*.s3-api.dal.objectstorage.adn.networklayer.com s3-api.dal.objectstorage.adn.networklayer.com	C=US, O=DigiCert Inc, OU=www.digicert.com, CN=GeoTrust RSA CA 2018
2018-06-25T19:25:03.534	2018-06-25T00:00:00	2019-08-02T12:00:00	s3-api.dal.objectstorage.adn.networklayer.com	*.s3-api.dal.objectstorage.adn.networklayer.com s3-api.dal.objectstorage.adn.networklayer.com	C=US, O=DigiCert Inc, OU=www.digicert.com, CN=GeoTrust RSA CA 2018
2016-08-02T21:45:06.055	2016-08-02T00:00:00	2019-08-02T23:59:59	s3-api.dal.objectstorage.adn.networklayer.com	*.s3-api.dal.objectstorage.adn.networklayer.com s3-api.dal.objectstorage.adn.networklayer.com	C=US, O=GeoTrust Inc., CN=GeoTrust SSL CA - G3
2016-08-02T21:45:06.055	2016-08-02T00:00:00	2019-08-02T23:59:59	s3-api.dal.objectstorage.adn.networklayer.com	*.s3-api.dal.objectstorage.adn.networklayer.com s3-api.dal.objectstorage.adn.networklayer.com	C=US, O=GeoTrust Inc., CN=GeoTrust SSL CA - G3