mx1.oncallcentre.com has no NS records.
NS records for this zone are defined at oncallcentre.com.
NS records for this zone are defined at oncallcentre.com.
Question and response
Question
dig mx1.oncallcentre.com. NS
Answer
The response has no answer records.
Authority
oncallcentre.com. 3600 SOA ns65.domaincontrol.com. dns.jomax.net. 2025082601 28800 7200 604800 3600
Additional
. 0 OPT ; payload 1280, xrcode 0, version 0, flags 0