CLI IP range lookup tool

[Ashley M. Kirchner]

    Is there a command line tool that can get me from '123.235.126.232' 
to '123.232.0.0/14' or even to '123.232.0.0:123.235.255.255'?

    Right now I'm manually using any of ripe.net, lacnic.net, or 
arin.net to go from the IP to the range '123.232.0.0:123.235.255.255' 
and then using 'netmask' to get to '123.232.0.0/14'.  I'm wondering if 
there's a single tool to go from one to the other.

    Thanks.