Icc.vitelcom.net has no NS records.
NS records for this zone are defined at vitelcom.net.
NS records for this zone are defined at vitelcom.net.
Question and response
Question
dig Icc.vitelcom.net. NS
Answer
The response has no answer records.
Authority
vitelcom.net. 150 SOA Icc.vitelcom.net. root.vitelcom.net. 946415640 10800 3600 604800 150
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0