d271626a.ess.barracudanetworks.com has no NS records.
NS records for this zone are defined at ess.barracudanetworks.com.
NS records for this zone are defined at ess.barracudanetworks.com.
Question and response
Question
dig d271626a.ess.barracudanetworks.com. NS
Answer
The response has no answer records.
Authority
ess.barracudanetworks.com. 900 SOA ns-1883.awsdns-43.co.uk. awsdns-hostmaster.amazon.com. 1 7200 900 1209600 86400
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0