ast1.softdebut.com has no CNAME records.
Question and response
Question
dig ast1.softdebut.com. NS
Answer
The response has no answer records.
Authority
softdebut.com. 1800 SOA neil.softdebut.com. dns.cloudflare.com. 2397534159 10000 2400 604800 1800
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0