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

Results for*.kublog.org

Logged At	Not Before	Not After	Common Name	Matching Identities	Issuer Name
2018-11-29T06:50:52.361	2018-11-27T00:00:00	2019-11-27T12:00:00	sni.cloudflaressl.com	*.kublog.org	C=US, ST=CA, L=San Francisco, O="CloudFlare, Inc.", CN=CloudFlare Inc ECC CA-2
2018-11-29T06:50:52.361	2018-11-27T00:00:00	2019-11-27T12:00:00	sni.cloudflaressl.com	*.kublog.org	C=US, ST=CA, L=San Francisco, O="CloudFlare, Inc.", CN=CloudFlare Inc ECC CA-2
2018-11-27T06:03:43.836	2018-11-27T00:00:00	2019-11-27T12:00:00	sni.cloudflaressl.com	*.kublog.org	C=US, ST=CA, L=San Francisco, O="CloudFlare, Inc.", CN=CloudFlare Inc ECC CA-2
2018-11-27T06:03:43.836	2018-11-27T00:00:00	2019-11-27T12:00:00	sni.cloudflaressl.com	*.kublog.org	C=US, ST=CA, L=San Francisco, O="CloudFlare, Inc.", CN=CloudFlare Inc ECC CA-2