ntpdfw1.ntppool.net has no NS records.
NS records for this zone are defined at ntppool.net.
NS records for this zone are defined at ntppool.net.
Question and response
Question
dig ntpdfw1.ntppool.net. NS
Answer
The response has no answer records.
Authority
ntppool.net. 600 SOA ns1.us.bitnames.com. dnsoper.bitnames.com. 2026021003 600 900 3628800 600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0