mx2.fibramax.ec has no NS records.
NS records for this zone are defined at fibramax.ec.
NS records for this zone are defined at fibramax.ec.
Question and response
Question
dig mx2.fibramax.ec. NS
Answer
The response has no answer records.
Authority
fibramax.ec. 86400 SOA fibramax.ec. root.fibramax.ec. 73 10800 900 604800 86400
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0