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

Results for*.store.pgp.com

Logged At	Not Before	Not After	Common Name	Matching Identities	Issuer Name
2020-01-29T03:11:32.405	2010-01-22T23:20:52	2013-01-22T23:20:21	*.store.pgp.com	*.store.pgp.com	C=DE, O=TC TrustCenter GmbH, OU=TC TrustCenter Class 2 L1 CA, CN=TC TrustCenter Class 2 L1 CA XI
2020-01-29T03:11:32.405	2010-01-22T23:20:52	2013-01-22T23:20:21	*.store.pgp.com	*.store.pgp.com	C=DE, O=TC TrustCenter GmbH, OU=TC TrustCenter Class 2 L1 CA, CN=TC TrustCenter Class 2 L1 CA XI
2020-01-25T08:52:35.579	2008-03-09T23:57:28	2013-03-09T23:57:28	*.store.pgp.com	*.store.pgp.com	C=US, ST=Arizona, L=Scottsdale, O="GoDaddy.com, Inc.", OU=http://certificates.godaddy.com/repository, CN=Go Daddy Secure Certification Authority, serialNumber=07969287
2020-01-25T08:52:35.579	2008-03-09T23:57:28	2013-03-09T23:57:28	*.store.pgp.com	*.store.pgp.com	C=US, ST=Arizona, L=Scottsdale, O="GoDaddy.com, Inc.", OU=http://certificates.godaddy.com/repository, CN=Go Daddy Secure Certification Authority, serialNumber=07969287