Whois comes as a commandline utility for Linux. You could create a shell script to do what you want with this utility.
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+-------------------------------------------+
|            Michael Surato                 |
|      College of Arts and Letters          |
|      Michigan State University            |
|            320 Linton Hall                |
|        East Lansing, MI 48824             |
| Voice: (517) 353-0778 Fax: (517) 355-0159 |
+-------------------------------------------+ 

>>> On 11/20/2008 at 7:46 AM, MSU Network Administrators Group
<[log in to unmask]> wrote:
> Does anyone know of a method for looking up the geographic location  
> (country, state) for a list of IP addresses? It would be a large list,  
> so I need a solution that could accommodate hundreds or more  
> addresses, which rules out doing this one at a time manually.
> 
> Thanks,
> John Williamson
> OMERAD
>