Apex domains cannot have CNAME records.
Question and response
Question
dig scm.dyxnet.com. NS
Answer
scm.dyxnet.com. 4 NS scmns2.dyxnet.com.
scm.dyxnet.com. 4 NS scmns1.dyxnet.com.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0