mail.orbiscom.com has no NS records.
NS records for this zone are defined at orbiscom.com.
NS records for this zone are defined at orbiscom.com.
Question and response
Question
dig mail.orbiscom.com. NS
Answer
The response has no answer records.
Authority
orbiscom.com. 300 SOA dns2.mastercard.com. hostmaster.mastercard.com. 2010062869 14400 3600 2419200 300
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0