Apex domains cannot have CNAME records.
Question and response
Question
dig epssw.net. NS
Answer
epssw.net. 5 NS dns3.ipmanagerinc.net.
epssw.net. 5 NS dns1.ipmanagerinc.net.
epssw.net. 5 NS dns2.ipmanagerinc.net.
Authority
The response has no authority records.
Additional
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
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