ns3.cresns.com has no NS records.
NS records for this zone are defined at cresns.com.
NS records for this zone are defined at cresns.com.
Question and response
Question
dig ns3.cresns.com. NS
Answer
The response has no answer records.
Authority
cresns.com. 900 SOA ns1.cresns.com. awsdns-hostmaster.amazon.com. 1 7200 900 1209600 86400
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0