Apex domains cannot have CNAME records.
Question and response
Question
dig ipserverone.com. NS
Answer
ipserverone.com. 1 NS ns1.ipserverone.com.
ipserverone.com. 1 NS ns2.ipserverone.com.
Authority
The response has no authority records.
Additional
ns1.ipserverone.com. 1 A 103.21.180.150
ns2.ipserverone.com. 1 A 165.22.88.239
ns1.ipserverone.com. 1 AAAA 2401:3400:9000:5:103:21:180:150
ns2.ipserverone.com. 1 AAAA 2a03:b0c0:3:d0:0:0:d64:9001
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0