ns4.unitedlayer.com has no CNAME records.
Question and response
Question
dig ns4.unitedlayer.com. NS
Answer
The response has no answer records.
Authority
unitedlayer.com. 3194 SOA ns1.unitedlayer.com. root.unitedlayer.com. 2026012001 3600 900 604800 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0