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

Results for*.picturewebhost.com

Logged At	Not Before	Not After	Common Name	Matching Identities	Issuer Name
2019-03-22T10:39:18.919	2019-03-22T09:39:18	2019-06-20T09:39:18	privaterus.com	*.picturewebhost.com	C=US, O=Let's Encrypt, CN=Let's Encrypt Authority X3
2019-03-22T10:39:18.919	2019-03-22T09:39:18	2019-06-20T09:39:18	privaterus.com	*.picturewebhost.com	C=US, O=Let's Encrypt, CN=Let's Encrypt Authority X3
2019-03-22T10:39:18.327	2019-03-22T09:39:18	2019-06-20T09:39:18	privaterus.com	*.picturewebhost.com	C=US, O=Let's Encrypt, CN=Let's Encrypt Authority X3
2019-03-22T10:39:18.327	2019-03-22T09:39:18	2019-06-20T09:39:18	privaterus.com	*.picturewebhost.com	C=US, O=Let's Encrypt, CN=Let's Encrypt Authority X3
2019-02-05T09:31:11.644	2019-02-05T08:31:10	2019-05-06T08:31:10	picturewebhost.com	*.picturewebhost.com	C=US, O=Let's Encrypt, CN=Let's Encrypt Authority X3
2019-02-05T09:31:11.644	2019-02-05T08:31:10	2019-05-06T08:31:10	picturewebhost.com	*.picturewebhost.com	C=US, O=Let's Encrypt, CN=Let's Encrypt Authority X3
2019-02-05T09:31:10.562	2019-02-05T08:31:10	2019-05-06T08:31:10	picturewebhost.com	*.picturewebhost.com	C=US, O=Let's Encrypt, CN=Let's Encrypt Authority X3
2019-02-05T09:31:10.562	2019-02-05T08:31:10	2019-05-06T08:31:10	picturewebhost.com	*.picturewebhost.com	C=US, O=Let's Encrypt, CN=Let's Encrypt Authority X3