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What is the best way of geocoding IP addresses? I have ~ 10,000 - 30,000 addresses to geocode once. The IP addresses are from all over the world and I only want the Long/Lat. Accuracy to the city level is not essential, but ideally it would be within 10-20 km. Searching around I saw MaxMind which seems like a good option, but before I download and frequent myself with their API, are there any other recommended alternatives out there?

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4 Answers

up vote 8 down vote accepted

IPInfoDB can be used. They don't have a query limit, but they will throttle you to 1 response/sec if you request too frequently.

Alternately, if you feel like writing a little bit more code, you can download their database and run the batch queries yourself. I can't imagine it'd take long to set up, and it will process your 30k IP addresses quite quickly.

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Thanks @Sasa, this is what I used. I downloaded their database and used that to process my data. It is amazing that it is free for non-commercial use! – djq Apr 9 '11 at 18:04
Glad to hear it worked for you! – Sasa Ivetic Apr 10 '11 at 0:06
Sadly: " We are apologized that we no longer provide database download. " – fiXedd Sep 14 '12 at 14:08
up vote 9 down vote

I have heard about simplegeo api https://simplegeo.com/docs/api-endpoints/simplegeo-context May work for you

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SimpleGeo shut down 4/1/2012. – runako Apr 1 '12 at 18:16
January 12th, 2012: After SimpleGeo was acquired by Urban Airship in Oct 2011, Urban Aiship said “wind down the availability of the current versions of [SimpleGeo's] Places, Context, and Storage over the next few months.”...The target date for pulling the plug officially will be March 31, 2012. Link – RyanDalton Feb 7 at 18:43
up vote 3 down vote

google analytics has ip located on a map. I wonder if it could be found in codeplex anywhere?
geocoding-net having the GeoPluginIPGeoCoder();
Also mentioned an issue with the plugin and aquisition of the dat file from... not free geolitecity from Maxmind

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up vote 2 down vote

If you don't want to lose time installing a database that will eat up your resources, you can use an online API. I am using http://www.ipgp.net/ip-address-geolocation-api/ and it let you to query up to 1m IP Addresses.

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It seems to only have a paid version - is this correct? – djq Mar 1 '12 at 22:07
It was free before, now it is paid only, but it worth. – Lucian Apostol Jan 11 at 11:07

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