/var/named/127.0.0.db

$TTL 3600
@ IN SOA ns1.gw.e-ryoichi.net. root.ns1.gw.e-ryoichi.net. (
2001022601 ; Serial
1800 ; Refresh
300 ; Retry
36000 ; Expire
3600 ) ; Minimum
IN NS ns1.gw.e-ryoichi.net.
IN NS ns1.e-ryoichi-home.net.

0 IN PTR localnetwork.
1 IN PTR localhost.