dd49800.kasserver.com has no NS records.
NS records for this zone are defined at kasserver.com.
NS records for this zone are defined at kasserver.com.
Question and response
Question
dig dd49800.kasserver.com. NS
Answer
The response has no answer records.
Authority
kasserver.com. 7200 SOA ns5.kasserver.com. hostmaster.kasserver.com. 2602251940 28800 7200 1209600 7200
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0