24.mta.nw011.com has no NS records.
NS records for this zone are defined at nw011.com.
NS records for this zone are defined at nw011.com.
Question and response
Question
dig 24.mta.nw011.com. NS
Answer
The response has no answer records.
Authority
nw011.com. 900 SOA ns-1711.awsdns-21.co.uk. awsdns-hostmaster.amazon.com. 1 7200 900 1209600 86400
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0