ns1.wix.com has no CNAME records.
Question and response
Question
dig ns1.wix.com. NS
Answer
The response has no answer records.
Authority
wix.com. 3600 SOA dns1.p03.nsone.net. hostmaster.nsone.net. 1749720499 3600 600 604800 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0