tor63vnszp07.srvr.bell.ca has no NS records.
NS records for this zone are defined at srvr.bell.ca.
NS records for this zone are defined at srvr.bell.ca.
Question and response
Question
dig tor63vnszp07.srvr.bell.ca. NS
Answer
The response has no answer records.
Authority
srvr.bell.ca. 900 SOA mtl02vnszs07.srvr.bell.ca. dns-admin.bellglobal.com. 9640 10800 3600 2419200 900
Additional
. 0 OPT ; payload 1220, xrcode 0, version 0, flags 0