mx1.fibertel.com.ar has no NS records.
NS records for this zone are defined at fibertel.com.ar.
NS records for this zone are defined at fibertel.com.ar.
Question and response
Question
dig mx1.fibertel.com.ar. NS
Answer
The response has no answer records.
Authority
fibertel.com.ar. 86400 SOA dns1.cvtci.com.ar. noc.fibertel.com.ar. 2026010501 86400 21600 604800 86400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0