Apex domains cannot have CNAME records.
Question and response
Question
dig citywest.com. NS
Answer
citywest.com. 5 NS ns3.secure-ssl-server.net.
citywest.com. 5 NS ns2.secure-ssl-server.net.
citywest.com. 5 NS ns1.secure-ssl-server.net.
Authority
The response has no authority records.
Additional
ns1.secure-ssl-server.net. 5 A 83.138.8.66
ns2.secure-ssl-server.net. 5 A 184.104.181.198
ns3.secure-ssl-server.net. 5 A 217.115.115.153
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0