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

Results forwww.criptocrew.com

Logged At	Not Before	Not After	Common Name	Matching Identities	Issuer Name
2018-07-23T02:02:47.326	2018-07-23T01:02:46	2018-10-21T01:02:46	www.criptocrew.com	www.criptocrew.com	C=US, O=Let's Encrypt, CN=Let's Encrypt Authority X3
2018-07-23T02:02:46.872	2018-07-23T01:02:46	2018-10-21T01:02:46	www.criptocrew.com	www.criptocrew.com	C=US, O=Let's Encrypt, CN=Let's Encrypt Authority X3
2018-05-24T03:02:29.033	2018-05-24T02:02:28	2018-08-22T02:02:28	www.criptocrew.com	www.criptocrew.com	C=US, O=Let's Encrypt, CN=Let's Encrypt Authority X3
2018-05-24T03:02:28.839	2018-05-24T02:02:28	2018-08-22T02:02:28	www.criptocrew.com	www.criptocrew.com	C=US, O=Let's Encrypt, CN=Let's Encrypt Authority X3
2018-03-25T04:02:24.731	2018-03-25T03:02:24	2018-06-23T03:02:24	www.criptocrew.com	www.criptocrew.com	C=US, O=Let's Encrypt, CN=Let's Encrypt Authority X3
2018-01-24T05:02:01.239	2018-01-24T04:02:01	2018-04-24T04:02:01	www.criptocrew.com	www.criptocrew.com	C=US, O=Let's Encrypt, CN=Let's Encrypt Authority X3