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

Results formx01.performancemanagementtools.com

Logged At	Not Before	Not After	Common Name	Matching Identities	Issuer Name
2025-10-23T00:48:33.693	2025-10-22T23:50:03	2026-01-20T23:50:02	mx01.performancemanagementtools.com	mx01.performancemanagementtools.com	C=US, O=Let's Encrypt, CN=R13
2025-10-23T00:48:33.351	2025-10-22T23:50:03	2026-01-20T23:50:02	mx01.performancemanagementtools.com	mx01.performancemanagementtools.com	C=US, O=Let's Encrypt, CN=R13
2023-01-17T18:19:49.071	2023-01-17T17:19:48	2023-04-17T17:19:47	performancemanagementtools.com	*.performancemanagementtools.com	C=US, O=Let's Encrypt, CN=R3
2023-01-17T18:19:48.87	2023-01-17T17:19:48	2023-04-17T17:19:47	performancemanagementtools.com	*.performancemanagementtools.com	C=US, O=Let's Encrypt, CN=R3
2022-11-18T16:19:16.766	2022-11-18T15:19:16	2023-02-16T15:19:15	performancemanagementtools.com	*.performancemanagementtools.com	C=US, O=Let's Encrypt, CN=R3
2022-11-18T16:19:16.438	2022-11-18T15:19:16	2023-02-16T15:19:15	performancemanagementtools.com	*.performancemanagementtools.com	C=US, O=Let's Encrypt, CN=R3