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

Results fortrytrove.co.renderproxy.com

Logged At	Not Before	Not After	Common Name	Matching Identities	Issuer Name
2020-02-03T23:44:15.603	2020-02-03T22:44:15	2020-05-03T22:44:15	www.trytrove.co.renderproxy.com	www.trytrove.co.renderproxy.com	C=US, O=Let's Encrypt, CN=Let's Encrypt Authority X3
2020-02-03T23:44:15.468	2020-02-03T22:44:15	2020-05-03T22:44:15	www.trytrove.co.renderproxy.com	www.trytrove.co.renderproxy.com	C=US, O=Let's Encrypt, CN=Let's Encrypt Authority X3
2020-02-03T23:15:54.299	2020-02-03T22:15:53	2020-05-03T22:15:53	trytrove.co.renderproxy.com	trytrove.co.renderproxy.com	C=US, O=Let's Encrypt, CN=Let's Encrypt Authority X3
2020-02-03T23:15:53.742	2020-02-03T22:15:53	2020-05-03T22:15:53	trytrove.co.renderproxy.com	trytrove.co.renderproxy.com	C=US, O=Let's Encrypt, CN=Let's Encrypt Authority X3