Apex domains cannot have CNAME records.
Question and response
Question
dig prohostic.net. NS
Answer
prohostic.net. 5 NS ns1.prohostic.net.
prohostic.net. 5 NS ns3.prohostic.net.
prohostic.net. 5 NS ns2.prohostic.net.
prohostic.net. 5 NS ns4.prohostic.net.
Authority
The response has no authority records.
Additional
ns1.prohostic.net. 5 A 162.251.82.122
ns1.prohostic.net. 5 A 162.251.82.123
ns1.prohostic.net. 5 A 162.251.82.250
ns1.prohostic.net. 5 A 162.251.82.251
ns2.prohostic.net. 5 A 162.251.82.120
ns2.prohostic.net. 5 A 162.251.82.121
ns2.prohostic.net. 5 A 162.251.82.248
ns2.prohostic.net. 5 A 162.251.82.249
ns3.prohostic.net. 5 A 162.251.82.118
ns3.prohostic.net. 5 A 162.251.82.119
ns3.prohostic.net. 5 A 162.251.82.246
ns3.prohostic.net. 5 A 162.251.82.247
ns4.prohostic.net. 5 A 162.251.82.124
ns4.prohostic.net. 5 A 162.251.82.125
ns4.prohostic.net. 5 A 162.251.82.252
ns4.prohostic.net. 5 A 162.251.82.253
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0