Las ip de los DNS que das, son correctas:
[celtha@gandalf ~]$ nslookup
> server 200.6.96.5
Default server: 200.6.96.5
Address: 200.6.96.5#53
> google.es
Server: 200.6.96.5
Address: 200.6.96.5#53
Non-authoritative answer:
Name: google.es
Address: 74.125.77.104
Name: google.es
Address: 209.85.229.104
Name: google.es
Address: 216.239.59.104
> google.cl
Server: 200.6.96.5
Address: 200.6.96.5#53
Non-authoritative answer:
Name: google.cl
Address: 216.239.59.104
Name: google.cl
Address: 74.125.77.104
Name: google.cl
Address: 209.85.229.104
>
Puedes ejecutar "nslookup" y "server", para garantizar que tienes estos DNS?
$nslookup
> server
Default server: 200.6.96.5
Address: 200.6.96.5#53
>
--
Manolo Alambra