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  IP to country converter?  (Read 2831 times)
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Offline bobjob

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« Posted 2009-05-05 21:21:37 »

Does anyone know an effective way to find the country of origin from an IPaddress?

I'v tried a few different java programs, but they all dont know my origin, yet other binary program do.

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Offline Mr_Light

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« Reply #1 - Posted 2009-05-05 21:55:19 »

Google for geolocation/geolocation there are quite some free ones which offer a simple webservice which you could easily use

for example:
http://www.hostip.info/use.html

your from:



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Offline bobjob

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« Reply #2 - Posted 2009-05-05 21:58:53 »

Lol, this app also doesnt know that my IP is AU.

Does anyone know the method WC3Banlist uses, as its results are accurate.

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Offline Riven
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« Reply #3 - Posted 2009-05-05 22:06:07 »

A very quick and dirty (and about 95% accurate) method is to resolve the IP, and look at the TLD.

Ofcourse .org .com and .net are in use by ISPs, but very often the TLD can be traced to a country.

It's how uTorrent does it..

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Offline bobjob

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« Reply #4 - Posted 2009-05-05 22:27:19 »

cool thanx guys for the suggestions.
I found a solution, that works with my IP address. Seems to be decent enough.


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Offline Ranger
« Reply #5 - Posted 2009-05-06 08:29:28 »

cool thanx guys for the suggestions.
I found a solution, that works with my IP address. Seems to be decent enough.

Can I ask how you did it?  The way I did it was I downloaded a mapping file (mapped an ip range to iso), then I parsed that into a lookup table.  I couldn't help but think there must have been a better way as the mapping file was 2.6Mb so the lookup table used a large chunk of memory!
Offline bobjob

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« Reply #6 - Posted 2009-05-07 04:23:03 »

Yeah that sounds about right.

The original file before its cut down to only the needed data is "IpToCountry.csv" which is 6+meg uncompressed, about 1+Meg compressed

seems accurate enough. I only use it server side, and send the country location to the client, so size doesnt really bother me.

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Offline Riven
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« Reply #7 - Posted 2009-05-07 10:46:38 »

To speedup lookup time, you could convert all IPs to an int, and build a tree structure. Then you're guaranteed to find the country in 32 steps.

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