Apex domains cannot have CNAME records.
Question and response
Question
dig zoneedit.co.uk. NS
Answer
zoneedit.co.uk. 3 NS dns3.easydns.org.
zoneedit.co.uk. 3 NS dns1.easydns.com.
zoneedit.co.uk. 3 NS dns2.easydns.net.
zoneedit.co.uk. 3 NS dns4.easydns.info.
Authority
The response has no authority records.
Additional
dns1.easydns.com. 2 A 64.68.196.10
dns2.easydns.net. 2 A 64.68.193.10
dns3.easydns.org. 2 A 64.68.192.10
dns4.easydns.info. 2 A 64.68.197.10
dns1.easydns.com. 2 AAAA 2620:49:3:0:0:0:0:10
dns2.easydns.net. 2 AAAA 2620:49:2:0:0:0:0:10
dns3.easydns.org. 2 AAAA 2620:49:1:0:0:0:0:10
dns4.easydns.info. 2 AAAA 2620:49:4:0:0:0:0:10
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0