mta-rel2 has no NS records.
NS records for this zone are defined at mta-rel2..
NS records for this zone are defined at mta-rel2..
Question and response
Question
dig mta-rel2. NS
Answer
The response has no answer records.
Authority
. 86400 SOA a.root-servers.net. nstld.verisign-grs.com. 2026022602 1800 900 604800 86400
Additional
. 0 OPT ; payload 1450, xrcode 0, version 0, flags 0