ns1.wp-ns.com has no CNAME records.
Question and response
Question
dig ns1.wp-ns.com. NS
Answer
The response has no answer records.
Authority
wp-ns.com. 60 SOA ns1.wp-ns.com. sysadmin.wps.pt. 2026030301 86400 7200 3600000 86400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0