Apex domains cannot have CNAME records.
Question and response
Question
dig mediamaisteri.com. NS
Answer
mediamaisteri.com. 5 NS ns-147-b.gandi.net.
mediamaisteri.com. 5 NS ns-203-c.gandi.net.
mediamaisteri.com. 5 NS ns-137-a.gandi.net.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0