mx.mailserv.nu has no NS records.
NS records for this zone are defined at mailserv.nu.
NS records for this zone are defined at mailserv.nu.
Question and response
Question
dig mx.mailserv.nu. NS
Answer
The response has no answer records.
Authority
mailserv.nu. 3600 SOA ns1.dnsserv.se. registry.dnsserv.se. 2025021433 86400 7200 3600000 3600
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0