dns64.dtlan.net has no NS records.
NS records for this zone are defined at dtlan.net.
NS records for this zone are defined at dtlan.net.
Question and response
Question
dig dns64.dtlan.net. NS
Answer
The response has no answer records.
Authority
dtlan.net. 900 SOA ns-545.awsdns-04.net. awsdns-hostmaster.amazon.com. 1 7200 900 1209600 86400
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0