Apex domains cannot have CNAME records.
Question and response
Question
dig hangar.hosting. NS
Answer
hangar.hosting. 2 NS ns2.hangar.hosting.
hangar.hosting. 2 NS ns1.hangar.hosting.
hangar.hosting. 2 NS ns3.hangar.hosting.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0