Apex domains cannot have CNAME records.
Question and response
Question
dig ritesim.com. NS
Answer
ritesim.com. 5 NS ns3.livedns.co.uk.
ritesim.com. 5 NS ns1.livedns.co.uk.
ritesim.com. 5 NS ns2.livedns.co.uk.
Authority
The response has no authority records.
Additional
ns1.livedns.co.uk. 5 A 217.160.81.244
ns2.livedns.co.uk. 5 A 217.160.82.244
ns3.livedns.co.uk. 5 A 185.132.35.244
ns1.livedns.co.uk. 5 AAAA 2001:8d8:fe:53:fa:0:0:1
ns2.livedns.co.uk. 5 AAAA 2001:8d8:fe:53:fa:0:0:2
ns3.livedns.co.uk. 5 AAAA 2607:f1c0:fe:53:185:132:35:244
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0