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

Results forwww.google.com

Resolver

Location

A

Name	TTL	Value
www.google.com	300	2607:f8b0:4004:c1f::67Google Public DNS (iad) / Google LLC
www.google.com	300	2607:f8b0:4004:c1f::68Google Public DNS (iad) / Google LLC
www.google.com	300	2607:f8b0:4004:c1f::69Google Public DNS (iad) / Google LLC
www.google.com	300	2607:f8b0:4004:c1f::93Google Public DNS (iad) / Google LLC