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

Results for*.g1.mailplug.com

Logged At	Not Before	Not After	Common Name	Matching Identities	Issuer Name
2024-08-05T01:21:04.891	2024-08-05T00:00:00	2025-08-05T23:59:59	*.g1.mailplug.com	*.g1.mailplug.com	C=GB, ST=Greater Manchester, L=Salford, O=Sectigo Limited, CN=Sectigo RSA Domain Validation Secure Server CA
2024-08-05T01:21:04.891	2024-08-05T00:00:00	2025-08-05T23:59:59	*.g1.mailplug.com	*.g1.mailplug.com	C=GB, ST=Greater Manchester, L=Salford, O=Sectigo Limited, CN=Sectigo RSA Domain Validation Secure Server CA
2024-08-05T01:21:03.949	2024-08-05T00:00:00	2025-08-05T23:59:59	*.g1.mailplug.com	*.g1.mailplug.com	C=GB, ST=Greater Manchester, L=Salford, O=Sectigo Limited, CN=Sectigo RSA Domain Validation Secure Server CA
2024-08-05T01:21:03.949	2024-08-05T00:00:00	2025-08-05T23:59:59	*.g1.mailplug.com	*.g1.mailplug.com	C=GB, ST=Greater Manchester, L=Salford, O=Sectigo Limited, CN=Sectigo RSA Domain Validation Secure Server CA