troy.centos-server.net CNAME records

CNAME Canonical name
Apex domains cannot have CNAME records.

Question and response

Question

dig troy.centos-server.net. NS

Answer

troy.centos-server.net. 5 NS troy-dns1.centos-server.net. troy.centos-server.net. 5 NS troy-dns2.centos-server.net.

Authority

The response has no authority records.

Additional

. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0