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

Results forapp.hub.la

Name	TTL	Value
app.hub.la	300	104.18.0.131Cloudflare, Inc.
app.hub.la	300	104.18.1.131Cloudflare, Inc.

Name	TTL	Value
app.hub.la	300	2606:4700::6812:83
app.hub.la	300	2606:4700::6812:183

A