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

Results for*.particle.li

Logged At	Not Before	Not After	Common Name	Matching Identities	Issuer Name
2020-07-09T02:33:06.765	2020-07-09T00:00:00	2021-07-09T12:00:00	sni.cloudflaressl.com	*.particle.li	C=US, O="Cloudflare, Inc.", CN=Cloudflare Inc ECC CA-3
2020-07-09T02:33:06.765	2020-07-09T00:00:00	2021-07-09T12:00:00	sni.cloudflaressl.com	*.particle.li	C=US, O="Cloudflare, Inc.", CN=Cloudflare Inc ECC CA-3
2020-01-20T21:52:20.203	2020-01-20T00:00:00	2020-10-09T12:00:00	sni.cloudflaressl.com	*.particle.li	C=US, ST=CA, L=San Francisco, O="CloudFlare, Inc.", CN=CloudFlare Inc ECC CA-2
2020-01-20T21:52:20.203	2020-01-20T00:00:00	2020-10-09T12:00:00	sni.cloudflaressl.com	*.particle.li	C=US, ST=CA, L=San Francisco, O="CloudFlare, Inc.", CN=CloudFlare Inc ECC CA-2
2019-02-23T00:47:19.951	2019-02-20T00:00:00	2020-02-20T12:00:00	sni.cloudflaressl.com	*.particle.li	C=US, ST=CA, L=San Francisco, O="CloudFlare, Inc.", CN=CloudFlare Inc ECC CA-2
2019-02-23T00:47:19.951	2019-02-20T00:00:00	2020-02-20T12:00:00	sni.cloudflaressl.com	*.particle.li	C=US, ST=CA, L=San Francisco, O="CloudFlare, Inc.", CN=CloudFlare Inc ECC CA-2
2019-02-20T16:04:59.204	2019-02-20T00:00:00	2020-02-20T12:00:00	sni.cloudflaressl.com	*.particle.li	C=US, ST=CA, L=San Francisco, O="CloudFlare, Inc.", CN=CloudFlare Inc ECC CA-2
2019-02-20T16:04:59.204	2019-02-20T00:00:00	2020-02-20T12:00:00	sni.cloudflaressl.com	*.particle.li	C=US, ST=CA, L=San Francisco, O="CloudFlare, Inc.", CN=CloudFlare Inc ECC CA-2