Apex domains cannot have CNAME records.
Question and response
Question
dig myhostadmin.net. NS
Answer
myhostadmin.net. 4 NS ns2.myhostadmin.net.
myhostadmin.net. 4 NS ns4.myhostadmin.net.
myhostadmin.net. 4 NS ns6.myhostadmin.net.
myhostadmin.net. 4 NS ns5.myhostadmin.net.
myhostadmin.net. 4 NS ns3.myhostadmin.net.
myhostadmin.net. 4 NS ns1.myhostadmin.net.
Authority
The response has no authority records.
Additional
ns1.myhostadmin.net. 4 A 60.247.150.254
ns1.myhostadmin.net. 4 A 118.123.249.114
ns1.myhostadmin.net. 4 A 118.123.253.132
ns2.myhostadmin.net. 4 A 61.172.183.73
ns2.myhostadmin.net. 4 A 211.149.230.100
ns3.myhostadmin.net. 4 A 61.172.183.77
ns3.myhostadmin.net. 4 A 118.123.249.114
ns4.myhostadmin.net. 4 A 118.123.253.132
ns4.myhostadmin.net. 4 A 211.149.230.100
ns5.myhostadmin.net. 4 A 61.172.183.73
ns5.myhostadmin.net. 4 A 118.123.249.114
ns6.myhostadmin.net. 4 A 60.247.150.13
ns6.myhostadmin.net. 4 A 118.123.253.132
ns6.myhostadmin.net. 4 A 180.163.194.206
ns1.myhostadmin.net. 4 AAAA 240e:d9:c200:0:0:0:0:2
ns1.myhostadmin.net. 4 AAAA 240e:d9:c200:123:0:0:0:2
ns2.myhostadmin.net. 4 AAAA 240e:d9:c200:1:0:0:0:2
ns3.myhostadmin.net. 4 AAAA 240e:d9:c200:0:0:0:0:2
ns4.myhostadmin.net. 4 AAAA 240e:d9:c200:1:0:0:0:2
ns5.myhostadmin.net. 4 AAAA 240e:d9:c200:0:0:0:0:2
ns6.myhostadmin.net. 4 AAAA 240e:d9:c200:1:0:0:0:2
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0