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

Results for*.buildnboost.com

Logged At	Not Before	Not After	Common Name	Matching Identities	Issuer Name
2020-07-28T14:38:25.555	2020-07-27T00:00:00	2021-07-27T12:00:00	sni.cloudflaressl.com	*.buildnboost.com	C=US, O="Cloudflare, Inc.", CN=Cloudflare Inc ECC CA-3
2020-07-28T14:38:25.555	2020-07-27T00:00:00	2021-07-27T12:00:00	sni.cloudflaressl.com	*.buildnboost.com	C=US, O="Cloudflare, Inc.", CN=Cloudflare Inc ECC CA-3
2020-07-27T01:22:57.538	2020-07-27T00:00:00	2021-07-27T12:00:00	sni.cloudflaressl.com	*.buildnboost.com	C=US, O="Cloudflare, Inc.", CN=Cloudflare Inc ECC CA-3
2020-07-27T01:22:57.538	2020-07-27T00:00:00	2021-07-27T12:00:00	sni.cloudflaressl.com	*.buildnboost.com	C=US, O="Cloudflare, Inc.", CN=Cloudflare Inc ECC CA-3
2020-01-12T12:58:13.406	2020-01-08T00:00:00	2020-10-09T12:00:00	sni.cloudflaressl.com	*.buildnboost.com	C=US, ST=CA, L=San Francisco, O="CloudFlare, Inc.", CN=CloudFlare Inc ECC CA-2
2020-01-12T12:58:13.406	2020-01-08T00:00:00	2020-10-09T12:00:00	sni.cloudflaressl.com	*.buildnboost.com	C=US, ST=CA, L=San Francisco, O="CloudFlare, Inc.", CN=CloudFlare Inc ECC CA-2
2020-01-08T09:30:42.057	2020-01-08T00:00:00	2020-10-09T12:00:00	sni.cloudflaressl.com	*.buildnboost.com	C=US, ST=CA, L=San Francisco, O="CloudFlare, Inc.", CN=CloudFlare Inc ECC CA-2
2020-01-08T09:30:42.057	2020-01-08T00:00:00	2020-10-09T12:00:00	sni.cloudflaressl.com	*.buildnboost.com	C=US, ST=CA, L=San Francisco, O="CloudFlare, Inc.", CN=CloudFlare Inc ECC CA-2