ns0.scaleway.com has no CNAME records.
Question and response
Question
dig ns0.scaleway.com. NS
Answer
The response has no answer records.
Authority
scaleway.com. 3150 SOA nsa.scaleway.com. hostmaster.scaleway.com. 2026021901 3600 300 604800 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0