mail.nic.md has no NS records.
NS records for this zone are defined at nic.md.
NS records for this zone are defined at nic.md.
Question and response
Question
dig mail.nic.md. NS
Answer
The response has no answer records.
Authority
nic.md. 1800 SOA annabel.ns.cloudflare.com. dns.cloudflare.com. 2398181355 10000 2400 604800 1800
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0