mail01.nextserver.hu has no NS records.
NS records for this zone are defined at nextserver.hu.
NS records for this zone are defined at nextserver.hu.
Question and response
Question
dig mail01.nextserver.hu. NS
Answer
The response has no answer records.
Authority
nextserver.hu. 1800 SOA josh.ns.cloudflare.com. dns.cloudflare.com. 2397754891 10000 2400 604800 1800
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0