Recursion testing

[Jon Leeman]

Would someone be able to point me to an on-line responder/tool/web site 
so I can test if my;

allow-recursion {
                 <my networks>;
                 localhost;
                 };

- on 3 nameservers - is in fact only allowing recursion from my local 
networks.  (I don't have access to another network to test at this time).

Thanks,

Jon