adns06.bigpond.com has no CNAME records.
Question and response
Question
dig adns06.bigpond.com. NS
Answer
The response has no answer records.
Authority
bigpond.com. 900 SOA adns05.bigpond.com. hostmaster.bigpond.com. 2026030402 7200 3600 2419200 900
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0