$TTL 60000
@ IN SOA 40.30.20.in-addr.arpa. nobody.nowhere. (
1 ; serial
28 ; refresh
14 ; retry
3600000 ; expire
0 ; negative cache ttl
)
@ IN NS 50.40.30.20.in-addr.arpa.
50.40.30.20.in-addr.arpa. IN A 20.30.40.50
50 PTR resdns.sillymail.com.