dns1.videotron.net has no NS records.
NS records for this zone are defined at videotron.net.
NS records for this zone are defined at videotron.net.
Question and response
Question
dig dns1.videotron.net. NS
Answer
The response has no answer records.
Authority
videotron.net. 3600 SOA dns1.videotron.net. dnsmaster.videotron.net. 2009103017 10800 3600 2592000 3600
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0