Apex domains cannot have CNAME records.
Question and response
Question
dig ipmanagerinc.net. NS
Answer
ipmanagerinc.net. 5 NS ns2.ipmanagerinc.net.
ipmanagerinc.net. 5 NS ns3.ipmanagerinc.net.
ipmanagerinc.net. 5 NS ns4.ipmanagerinc.net.
ipmanagerinc.net. 5 NS ns5.ipmanagerinc.net.
ipmanagerinc.net. 5 NS dns1.ipmanagerinc.net.
ipmanagerinc.net. 5 NS dns2.ipmanagerinc.net.
ipmanagerinc.net. 5 NS dns3.ipmanagerinc.net.
ipmanagerinc.net. 5 NS ns01.brandshelter.com.
ipmanagerinc.net. 5 NS ns02.brandshelter.net.
ipmanagerinc.net. 5 NS ns1.ipmanagerinc.net.
Authority
The response has no authority records.
Additional
ns1.ipmanagerinc.net. 5 A 193.227.117.15
ns2.ipmanagerinc.net. 5 A 194.50.187.16
ns3.ipmanagerinc.net. 5 A 193.227.117.15
ns4.ipmanagerinc.net. 5 A 194.50.187.16
ns5.ipmanagerinc.net. 5 A 193.227.117.15
dns1.ipmanagerinc.net. 5 A 193.227.117.15
dns2.ipmanagerinc.net. 5 A 194.50.187.16
dns3.ipmanagerinc.net. 5 A 193.227.117.15
ns1.ipmanagerinc.net. 5 AAAA 2a04:2b00:14cc:0:0:0:0:15
ns2.ipmanagerinc.net. 5 AAAA 2a04:2b00:14dd:0:0:0:0:16
ns3.ipmanagerinc.net. 5 AAAA 2a04:2b00:14cc:0:0:0:0:15
ns4.ipmanagerinc.net. 5 AAAA 2a04:2b00:14dd:0:0:0:0:16
ns5.ipmanagerinc.net. 5 AAAA 2a04:2b00:14cc:0:0:0:0:15
dns1.ipmanagerinc.net. 5 AAAA 2a04:2b00:14cc:0:0:0:0:15
dns2.ipmanagerinc.net. 5 AAAA 2a04:2b00:14dd:0:0:0:0:16
dns3.ipmanagerinc.net. 5 AAAA 2a04:2b00:14cc:0:0:0:0:15
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0