dns1.a1.net has no CNAME records.
Question and response
Question
dig dns1.a1.net. NS
Answer
The response has no answer records.
Authority
a1.net. 1167 SOA dns1.a1.net. domainadmin.a1.net. 2026030301 10800 3600 1814400 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0