ptr.kionetworks.com has no NS records.
NS records for this zone are defined at kionetworks.com.
NS records for this zone are defined at kionetworks.com.
Question and response
Question
dig ptr.kionetworks.com. NS
Answer
The response has no answer records.
Authority
kionetworks.com. 3600 SOA ns1.kionetworks.net. redteam.kionetworks.com. 2015033251 86400 900 1209600 3600
Additional
. 0 OPT ; payload 1220, xrcode 0, version 0, flags 0