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

Results fordashboard-proxy1.yyz2.oniaas.io

Resolver

Location

A

Name	TTL	Value
dashboard-proxy1.yyz2.oniaas.io	300	208.79.216.29HostPapa

Name	TTL	Value
dashboard-proxy1.yyz2.oniaas.io	300	2605:6f00:1234:206:1::2ac / HostPapa

Name	TTL	Value
dashboard-proxy1.yyz2.oniaas.io	300	0 issue "letsencrypt.org ; validationmethods=dns-01; accounturi=https://acme-v02.api.letsencrypt.org /acme/acct/1519800706"
dashboard-proxy1.yyz2.oniaas.io	300	0 issuewild "letsencrypt.org ; validationmethods=dns-01; accounturi=https://acme-v02.api.letsencrypt.org /acme/acct/1519800706"