1. ccTLD/親子ゾーン同居

そして、子ゾーン内の名前をもつ。

../uk ../br ../ca ../cn

../ru ../it ../mx ../kr

../mx ../cz

/NSなしのサブドメイン名

2. 三世代同居

nsw.gov.au など 

$ dnsq ns nsw.gov.au x.au
2 nsw.gov.au:
92 bytes, 1+4+0+0 records, response, authoritative, noerror
query: 2 nsw.gov.au
answer: nsw.gov.au 86400 NS w.au
answer: nsw.gov.au 86400 NS z.au
answer: nsw.gov.au 86400 NS x.au
answer: nsw.gov.au 86400 NS y.au

$ dnsq a www.nsw.gov.au x.au
1 www.nsw.gov.au:
154 bytes, 1+0+3+2 records, response, noerror
query: 1 www.nsw.gov.au
authority: www.nsw.gov.au 14400 NS ns1.telstra.net
authority: www.nsw.gov.au 14400 NS dr1-dns03.servicefirst.nsw.gov.au
authority: www.nsw.gov.au 14400 NS dc1-dns03.servicefirst.nsw.gov.au
additional: dc1-dns03.servicefirst.nsw.gov.au 14400 A 143.119.160.23
additional: dr1-dns03.servicefirst.nsw.gov.au 14400 A 143.119.162.23