api.kunleisys.com has no NS records.
NS records for this zone are defined at kunleisys.com.
NS records for this zone are defined at kunleisys.com.
Question and response
Question
dig api.kunleisys.com. NS
Answer
The response has no answer records.
Authority
kunleisys.com. 300 SOA ns1.design69.net. hostmaster.design69.net. 2014071577 10800 3600 604800 300
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0