ns3.ym.rnc.net.cable.rogers.com has no NS records.
NS records for this zone are defined at rnc.net.cable.rogers.com.
NS records for this zone are defined at rnc.net.cable.rogers.com.
Question and response
Question
dig ns3.ym.rnc.net.cable.rogers.com. NS
Answer
The response has no answer records.
Authority
rnc.net.cable.rogers.com. 900 SOA pub1-master1-iblox-wlfdle.mgmt.net.rogers.com. cnrbacc.rci.rogers.com. 1 10800 3600 2419200 900
Additional
. 0 OPT ; payload 1220, xrcode 0, version 0, flags 0