Apex domains cannot have CNAME records.
Question and response
Question
dig iplannetworks.net. NS
Answer
iplannetworks.net. 3 NS ns5.mpower.nl.
iplannetworks.net. 3 NS ns6.mpower.nl.
Authority
The response has no authority records.
Additional
ns5.mpower.nl. 3 A 217.18.70.157
ns6.mpower.nl. 3 A 217.18.70.158
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0