mx01.start.ca has no NS records.
NS records for this zone are defined at start.ca.
NS records for this zone are defined at start.ca.
Question and response
Question
dig mx01.start.ca. NS
Answer
The response has no answer records.
Authority
start.ca. 300 SOA dns61.telus.com. dnsadmin2.telus.com. 2025061896 3600 600 3600000 86400
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0