Apex domains cannot have CNAME records.
Question and response
Question
dig dhcp.imoncommunications.net. NS
Answer
dhcp.imoncommunications.net. 5 NS dns2.imoncommunications.net.
dhcp.imoncommunications.net. 5 NS dns1.imoncommunications.net.
Authority
The response has no authority records.
Additional
dns1.imoncommunications.net. 5 A 207.191.192.141
dns2.imoncommunications.net. 5 A 207.191.192.142
dns1.imoncommunications.net. 5 AAAA 2605:3f80:1:0:0:0:0:1
dns2.imoncommunications.net. 5 AAAA 2605:3f80:1:0:0:0:0:2
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0