mx.cogecocommercial.ca has no NS records.
NS records for this zone are defined at cogecocommercial.ca.
NS records for this zone are defined at cogecocommercial.ca.
Question and response
Question
dig mx.cogecocommercial.ca. NS
Answer
The response has no answer records.
Authority
cogecocommercial.ca. 300 SOA ns4.cgocable.net. dnsadmin.cgocable.net. 2007012700 1800 900 604800 86400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0