ns20.ixwebhosting.com has no CNAME records.
Question and response
Question
dig ns20.ixwebhosting.com. NS
Answer
The response has no answer records.
Authority
ixwebhosting.com. 1313 SOA lee.ns.cloudflare.com. dns.cloudflare.com. 2395909616 10000 2400 604800 1800
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0