admmx.ppt001.com has no NS records.
NS records for this zone are defined at ppt001.com.
NS records for this zone are defined at ppt001.com.
Question and response
Question
dig admmx.ppt001.com. NS
Answer
The response has no answer records.
Authority
ppt001.com. 180 SOA ns20.digicertdns.com. dns.digicertdns.com. 2009014335 43200 3600 1209600 180
Additional
. 0 OPT ; payload 1280, xrcode 0, version 0, flags 0