spf2.aussiebroadband.com.au has no CNAME records.
Question and response
Question
dig spf2.aussiebroadband.com.au. NS
Answer
The response has no answer records.
Authority
aussiebroadband.com.au. 393 SOA thomas.ns.cloudflare.com. dns.cloudflare.com. 2398038616 10000 2400 604800 1800
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0