dns100.ovh.us has no CNAME records.
Question and response
Question
dig dns100.ovh.us. NS
Answer
The response has no answer records.
Authority
ovh.us. 60 SOA dns100.ovh.us. tech.ovh.us. 2026021700 86400 3600 3600000 60
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0