blue.net CNAME records

CNAME Canonical name
Apex domains cannot have CNAME records.

Question and response

Question

dig blue.net. NS

Answer

blue.net. 5 NS ns3.blue.net. blue.net. 5 NS ns2.blue.net. blue.net. 5 NS ns1.blue.net.

Authority

The response has no authority records.

Additional

ns1.blue.net. 5 A 66.38.0.244 ns2.blue.net. 5 A 66.38.1.244 ns3.blue.net. 5 A 66.38.1.241 . 0 OPT ; payload 1232, xrcode 0, version 0, flags 0