From my experience, I have had reported one incorrect country-level
IP from Maxmind's paid service (returned US vrs Canada for a Canadian
IP). But their free version is based on the commercial lists, just not
updated as often, or automatically (you download and store locally on
your server). So should be nearly as accurate as long as you maintain
the lists (ie. think is weekly, being 2-weeks behind).
That said, someone on another list is running a geo-location service
comparison test, where you click links to the various services, then
enter the location they returned. He was compiling the results, and so
far has reported the following:
---------QUOTE-------
So far some crazy numbers and realities. Of these numbers, all of the
vendors missed 25 exact city locations equally. So our continued plan
is to measure how far off the approx. 25% are so we can then say, "OK,
x vendor is 100% accurate up to x% and then x% accurate within say x-y
miles". The shocking thing to us is still how some of the more
expensive providers will say their definition of accuracy on a city
level can be within 25 miles. Thus you would receive statistical
confidence of a 90-100 for an IP that shows Pasadena, Calif. and yet
in reality be located in Long Beach, Calif., or the same for San Jose,
Ca. and yet be further up the peninsula in San Carlos, Ca.
total: 103
ip2: 55
quova: 46
ipiligence: 32
whatis: 62
maxmind: 63
By the way, we are obviously way short still on queries so if you
haven't clicked on the link, please do so and follow some ez pz
instructions:
http://www.stratosanalytics.com/iplookup.html
---------END QUOTE-----------
So help him out by clicking the link (although not sure what he means
by "e-zed-p-zed instructions".... ;-{)] )
George
On 14-Dec-09, at 5:07 AM, Angelo Zanetti wrote:
-----Original Message-----
From: George Langley [mailto:george.langley@xxxxxxx]
Sent: 19 October 2009 01:38 AM
To: php-general@xxxxxxxxxxxxx
Subject: Re: ip-to-country
On 18-Oct-09, at 1:03 PM, SED wrote:
How can I access an index for IP to a country (or a more detailed
location)?
------------
<http://www.maxmind.com/app/ip-location>
has both free and various paid services.
George
Hi George,
How accurate are the free ones compared to the paid ones?
Regards
Angelo
http://www.elemental.co.za
http://www.wapit.co.za
