pool.ntp.casjay.nl has no NS records.
NS records for this zone are defined at casjay.nl.
NS records for this zone are defined at casjay.nl.
Question and response
Question
dig casjay.pool.ntp.org. NS
Answer
The response has no answer records.
Authority
pool.ntp.org. 782 SOA a.ntpns.org. hostmaster.pool.ntp.org. 1772892564 5400 5400 1209600 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0