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

Results for*.pinggoogle.com

Logged At	Not Before	Not After	Common Name	Matching Identities	Issuer Name
2023-01-17T18:08:52.73	2023-01-17T17:08:52	2023-04-17T17:08:51	pinggoogle.com	*.pinggoogle.com	C=US, O=Let's Encrypt, CN=R3
2023-01-17T18:08:52.73	2023-01-17T17:08:52	2023-04-17T17:08:51	pinggoogle.com	*.pinggoogle.com	C=US, O=Let's Encrypt, CN=R3
2023-01-17T18:08:52.509	2023-01-17T17:08:52	2023-04-17T17:08:51	pinggoogle.com	*.pinggoogle.com	C=US, O=Let's Encrypt, CN=R3
2023-01-17T18:08:52.509	2023-01-17T17:08:52	2023-04-17T17:08:51	pinggoogle.com	*.pinggoogle.com	C=US, O=Let's Encrypt, CN=R3
2022-11-18T16:07:30.208	2022-11-18T15:07:29	2023-02-16T15:07:28	pinggoogle.com	*.pinggoogle.com	C=US, O=Let's Encrypt, CN=R3
2022-11-18T16:07:30.208	2022-11-18T15:07:29	2023-02-16T15:07:28	pinggoogle.com	*.pinggoogle.com	C=US, O=Let's Encrypt, CN=R3
2022-11-18T16:07:29.715	2022-11-18T15:07:29	2023-02-16T15:07:28	pinggoogle.com	*.pinggoogle.com	C=US, O=Let's Encrypt, CN=R3
2022-11-18T16:07:29.715	2022-11-18T15:07:29	2023-02-16T15:07:28	pinggoogle.com	*.pinggoogle.com	C=US, O=Let's Encrypt, CN=R3