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maxmind / libmaxminddb

C library for the MaxMind DB file format
https://maxmind.github.io/libmaxminddb/
Apache License 2.0
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comparing results of IP countries #311

Closed tbswork1 closed 1 year ago

tbswork1 commented 1 year ago

I used a project to test the IP country returned by libmaxminddb's Geolite2 Country (2020-08-07) and ip2location's Lite IP-Country (2022-10-29) on 10K random IPs and get the attached results. There are many IP being resolved in different countries. And how to known which is correct? Thanks.

(I am trying to verify the advertised accuracy of maxmind's 99.8% vs ip2location's 98%.)

country_test_ipv4_data_mass_ip2location_res.txt country_test_ipv4_data_mass_maxmind_res.txt

oschwald commented 1 year ago

This repo is just for the C library, not any particular data set. I'd encourage you to reach out to support@maxmind.com with questions about the data.

That said, if I were trying to compare two databases, I would start with a list of IPs where I know the location and compare the results. If you don't know the locations, it will be difficult to determine which is correct. If you are using random IPs, it is also likely that some of the difference are for IPs that are not actually in use where the correct answer is less clearly defined.