Apex domains cannot have CNAME records.
Question and response
Question
dig mond.net. NS
Answer
mond.net. 5 NS ns-87-a.gandi.net.
mond.net. 5 NS ns-222-b.gandi.net.
mond.net. 5 NS ns-57-c.gandi.net.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0