ccTLD/au/com.auについて、ここに記述してください。

com.au は au と同居

$ dnsq ns com.au x.au

2 com.au:
88 bytes, 1+4+0+0 records, response, authoritative, noerror
query: 2 com.au
answer: com.au 86400 NS x.au
answer: com.au 86400 NS w.au
answer: com.au 86400 NS z.au
answer: com.au 86400 NS y.au

$ dnsq a www.google.com.au x.au

1 www.google.com.au:
117 bytes, 1+0+4+0 records, response, noerror
query: 1 www.google.com.au
authority: google.com.au 14400 NS ns4.google.com
authority: google.com.au 14400 NS ns2.google.com
authority: google.com.au 14400 NS ns1.google.com
authority: google.com.au 14400 NS ns3.google.com