ns4.cableone.net has no CNAME records.
Question and response
Question
dig ns4.cableone.net. NS
Answer
The response has no answer records.
Authority
cableone.net. 203 SOA ns1.cableone.net. tech.cableone.net. 1900 300 300 300 300
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0