txplanappsgw01.pla.dc.xo.com has no NS records.
NS records for this zone are defined at dc.xo.com.
NS records for this zone are defined at dc.xo.com.
Question and response
Question
dig txplanappsgw01.pla.dc.xo.com. NS
Answer
The response has no answer records.
Authority
dc.xo.com. 3600 SOA ns-twbg.verizonwireless.com. hostmaster.xo.com. 2016040997 86400 86400 86400 86400
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0