pb.edu.pl CNAME records

CNAME Canonical name
Apex domains cannot have CNAME records.

Question and response

Question

dig pb.edu.pl. NS

Answer

pb.edu.pl. 5 NS master.man.bialystok.pl. pb.edu.pl. 5 NS dns.man.bialystok.pl.

Authority

The response has no authority records.

Additional

master.man.bialystok.pl. 5 A 212.33.64.18 . 0 OPT ; payload 1232, xrcode 0, version 0, flags 0