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

Results for*.simplexml.com

Logged At	Not Before	Not After	Common Name	Matching Identities	Issuer Name
2023-01-17T19:11:43.549	2023-01-17T18:11:43	2023-04-17T18:11:42	simplexml.com	*.simplexml.com	C=US, O=Let's Encrypt, CN=R3
2023-01-17T19:11:43.549	2023-01-17T18:11:43	2023-04-17T18:11:42	simplexml.com	*.simplexml.com	C=US, O=Let's Encrypt, CN=R3
2023-01-17T19:11:43.467	2023-01-17T18:11:43	2023-04-17T18:11:42	simplexml.com	*.simplexml.com	C=US, O=Let's Encrypt, CN=R3
2023-01-17T19:11:43.467	2023-01-17T18:11:43	2023-04-17T18:11:42	simplexml.com	*.simplexml.com	C=US, O=Let's Encrypt, CN=R3
2022-11-18T17:12:15.854	2022-11-18T16:12:15	2023-02-16T16:12:14	simplexml.com	*.simplexml.com	C=US, O=Let's Encrypt, CN=R3
2022-11-18T17:12:15.854	2022-11-18T16:12:15	2023-02-16T16:12:14	simplexml.com	*.simplexml.com	C=US, O=Let's Encrypt, CN=R3
2022-11-18T17:12:15.15	2022-11-18T16:12:15	2023-02-16T16:12:14	simplexml.com	*.simplexml.com	C=US, O=Let's Encrypt, CN=R3
2022-11-18T17:12:15.15	2022-11-18T16:12:15	2023-02-16T16:12:14	simplexml.com	*.simplexml.com	C=US, O=Let's Encrypt, CN=R3