mail.atom86.net has no NS records.
NS records for this zone are defined at atom86.net.
NS records for this zone are defined at atom86.net.
Question and response
Question
dig mail.atom86.net. NS
Answer
The response has no answer records.
Authority
atom86.net. 1800 SOA fred.ns.cloudflare.com. dns.cloudflare.com. 2393460861 10000 2400 604800 1800
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0