Apex domains cannot have CNAME records.
Question and response
Question
dig mldnet.com. NS
Answer
mldnet.com. 5 NS ns2.mldnet.com.
mldnet.com. 5 NS ns.mldnet.com.
Authority
The response has no authority records.
Additional
ns.mldnet.com. 5 A 212.56.192.10
ns2.mldnet.com. 5 A 212.56.192.20
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0