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

Results for*.greelab.com

Logged At	Not Before	Not After	Common Name	Matching Identities	Issuer Name
2021-01-01T23:57:05.306	2020-12-29T00:00:00	2021-12-28T23:59:59	sni.cloudflaressl.com	*.greelab.com	C=US, O="Cloudflare, Inc.", CN=Cloudflare Inc ECC CA-3
2021-01-01T23:57:05.306	2020-12-29T00:00:00	2021-12-28T23:59:59	sni.cloudflaressl.com	*.greelab.com	C=US, O="Cloudflare, Inc.", CN=Cloudflare Inc ECC CA-3
2020-12-29T15:06:41.535	2020-12-29T00:00:00	2021-12-28T23:59:59	sni.cloudflaressl.com	*.greelab.com	C=US, O="Cloudflare, Inc.", CN=Cloudflare Inc ECC CA-3
2020-12-29T15:06:41.535	2020-12-29T00:00:00	2021-12-28T23:59:59	sni.cloudflaressl.com	*.greelab.com	C=US, O="Cloudflare, Inc.", CN=Cloudflare Inc ECC CA-3
2020-12-16T09:57:08.939	2020-12-16T00:00:00	2021-12-15T23:59:59	sni.cloudflaressl.com	*.greelab.com	C=US, O="Cloudflare, Inc.", CN=Cloudflare Inc ECC CA-3
2020-12-16T09:57:08.939	2020-12-16T00:00:00	2021-12-15T23:59:59	sni.cloudflaressl.com	*.greelab.com	C=US, O="Cloudflare, Inc.", CN=Cloudflare Inc ECC CA-3