mail.fiberdisk.com.ar has no NS records.
NS records for this zone are defined at fiberdisk.com.ar.
NS records for this zone are defined at fiberdisk.com.ar.
Question and response
Question
dig mail.fiberdisk.com.ar. NS
Answer
The response has no answer records.
Authority
fiberdisk.com.ar. 21600 SOA dns1.cvtci.com.ar. noc.fiberdisk.com.ar. 2026011500 86400 21600 604800 21600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0