ntp1.leontp.com has no NS records.
NS records for this zone are defined at leontp.com.
NS records for this zone are defined at leontp.com.
Question and response
Question
dig ntp1.leontp.com. NS
Answer
The response has no answer records.
Authority
leontp.com. 86400 SOA ns1.nevisinternet.net. matthewredman.ncl.local. 2026031603 3600 1800 1209600 86400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0