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

Results for*.expluto.tk

Logged At	Not Before	Not After	Common Name	Matching Identities	Issuer Name
2020-01-26T14:13:26.556	2020-01-26T00:00:00	2020-10-09T12:00:00	sni.cloudflaressl.com	*.expluto.tk	C=US, ST=CA, L=San Francisco, O="CloudFlare, Inc.", CN=CloudFlare Inc ECC CA-2
2020-01-26T14:13:26.556	2020-01-26T00:00:00	2020-10-09T12:00:00	sni.cloudflaressl.com	*.expluto.tk	C=US, ST=CA, L=San Francisco, O="CloudFlare, Inc.", CN=CloudFlare Inc ECC CA-2
2019-02-26T05:43:50.435	2019-02-26T00:00:00	2020-02-26T12:00:00	sni.cloudflaressl.com	*.expluto.tk	C=US, ST=CA, L=San Francisco, O="CloudFlare, Inc.", CN=CloudFlare Inc ECC CA-2
2019-02-26T05:43:50.435	2019-02-26T00:00:00	2020-02-26T12:00:00	sni.cloudflaressl.com	*.expluto.tk	C=US, ST=CA, L=San Francisco, O="CloudFlare, Inc.", CN=CloudFlare Inc ECC CA-2