x.incapdns.net has no NS records.
NS records for this zone are defined at incapdns.net.
NS records for this zone are defined at incapdns.net.
Question and response
Question
dig x.incapdns.net. NS
Answer
The response has no answer records.
Authority
incapdns.net. 300 SOA ns1.incapdns.net. hostmaster.incapsula.com. 5 3600 600 604800 60
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0