mta.enviecobrancas.com has no NS records.
NS records for this zone are defined at enviecobrancas.com.
NS records for this zone are defined at enviecobrancas.com.
Question and response
Question
dig mta.enviecobrancas.com. NS
Answer
The response has no answer records.
Authority
enviecobrancas.com. 1800 SOA kim.ns.cloudflare.com. dns.cloudflare.com. 2398459122 10000 2400 604800 1800
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0