Apex domains cannot have CNAME records.
Question and response
Question
dig eatserver.nl. NS
Answer
eatserver.nl. 3 NS ns.eatserver.nl.
eatserver.nl. 3 NS ns2.eatserver.nl.
Authority
The response has no authority records.
Additional
ns.eatserver.nl. 3 A 62.221.202.210
ns2.eatserver.nl. 3 A 195.20.11.100
ns.eatserver.nl. 3 AAAA 2001:1460:3:4:1c00:aeff:fe00:2715
ns2.eatserver.nl. 3 AAAA 2001:1460:2:0:1c21:e9ff:fe00:1b6
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0