_spf.shawcable.net has no NS records.
NS records for this zone are defined at shawcable.net.
NS records for this zone are defined at shawcable.net.
Question and response
Question
dig _spf.shawcable.net. NS
Answer
The response has no answer records.
Authority
shawcable.net. 60 SOA ns7.no.cg.shawcable.net. dnsadmin.shaw.ca. 2003245715 10800 3600 604800 60
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0