mx-backup.iwayafrica.net has no NS records.
NS records for this zone are defined at iwayafrica.net.
NS records for this zone are defined at iwayafrica.net.
Question and response
Question
dig mx-backup.iwayafrica.net. NS
Answer
The response has no answer records.
Authority
iwayafrica.net. 900 SOA ns-1611.awsdns-09.co.uk. awsdns-hostmaster.amazon.com. 1 7200 900 1209600 86400
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0