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

Results for*.1rstdeal.com

Logged At	Not Before	Not After	Common Name	Matching Identities	Issuer Name
2019-02-27T08:28:29.219	2019-02-27T07:28:28	2019-05-28T07:28:28	1rstdeal.com	*.1rstdeal.com	C=US, O=Let's Encrypt, CN=Let's Encrypt Authority X3
2019-02-27T08:28:29.219	2019-02-27T07:28:28	2019-05-28T07:28:28	1rstdeal.com	*.1rstdeal.com	C=US, O=Let's Encrypt, CN=Let's Encrypt Authority X3
2019-02-27T08:28:28.121	2019-02-27T07:28:28	2019-05-28T07:28:28	1rstdeal.com	*.1rstdeal.com	C=US, O=Let's Encrypt, CN=Let's Encrypt Authority X3
2019-02-27T08:28:28.121	2019-02-27T07:28:28	2019-05-28T07:28:28	1rstdeal.com	*.1rstdeal.com	C=US, O=Let's Encrypt, CN=Let's Encrypt Authority X3
2018-12-06T09:47:07.506	2018-12-06T08:47:07	2019-03-06T08:47:07	wisconsinsurplusonline.com	*.1rstdeal.com	C=US, O=Let's Encrypt, CN=Let's Encrypt Authority X3
2018-12-06T09:47:07.506	2018-12-06T08:47:07	2019-03-06T08:47:07	wisconsinsurplusonline.com	*.1rstdeal.com	C=US, O=Let's Encrypt, CN=Let's Encrypt Authority X3
2018-12-06T09:47:07.102	2018-12-06T08:47:07	2019-03-06T08:47:07	wisconsinsurplusonline.com	*.1rstdeal.com	C=US, O=Let's Encrypt, CN=Let's Encrypt Authority X3
2018-12-06T09:47:07.102	2018-12-06T08:47:07	2019-03-06T08:47:07	wisconsinsurplusonline.com	*.1rstdeal.com	C=US, O=Let's Encrypt, CN=Let's Encrypt Authority X3