dns1.nac.net has no CNAME records.
Question and response
Question
dig dns1.nac.net. NS
Answer
The response has no answer records.
Authority
nac.net. 748 SOA ns1.nac.net. dnsadmin.nac.net. 2025062702 10800 900 604800 86400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0