urs2.mx.csodfed.com has no NS records.
NS records for this zone are defined at csodfed.com.
NS records for this zone are defined at csodfed.com.
Question and response
Question
dig urs2.mx.csodfed.com. NS
Answer
The response has no answer records.
Authority
csodfed.com. 900 SOA ns-1930.awsdns-49.co.uk. awsdns-hostmaster.amazon.com. 1 7200 900 1209600 86400
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0