IP lookup using Maxmind databases

npm install maxmind
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node-maxmind Build Status

Native Javascript module for IP GEO lookup using Maxmind databases. Up to 500% faster than other GEO lookup libraries. No binary or whatsoever dependencies.

GEO databases

Free GEO databases available for download here:


npm i maxmind

Main features

  • Country/Region/Location lookup by IP (v4 and v6)
  • Distance between two IP addresses (locations)
  • Timezone lookup by IP
  • Autonomous System Numbers (ASN) lookup by IP

Module written in pure Javascript with no dependencies. Being able to work with binary Maxmind databases it doesn't require any "CSV - {specific lib format}" conversions as other modules do. Maxmind binary databases are highly optimized for size and performance so there's no point working with other than that format.


see code samples in ./examples directory

var maxmind = require('maxmind');

// City/Location lookup
var location = maxmind.getLocation('');

// Country Lookup
var country = maxmind.getCountry('');

// Autonomous System Numbers (ASN) lookup
var org = maxmind.getOrganization('');

V6 Support

Module is fully campatible with IPv6 maxmind databases. Make sure you initialize with proper IPv6 databases before making queries.

var location = maxmind.getLocationV6('2001:4860:0:1001::3004:ef68');

All methods works in the same way as for IPv4, the only difference is V6 postfix in method names: getCountryV6, getLocationV6 and getOrganizationV6.

You can initialize module with several databases at once, and proper db will be automatically selected for particular query. If any option is given it applies to all databases you initialize.

var maxmind = require('maxmind');
maxmind.init(['/path/to/GeoLiteCity.dat', '/path/to/GeoIPASNum.dat']);
// now both org and location lookups will work
var org = maxmind.getOrganization('');
var location = maxmind.getLocation('');


By default module does not use cache, and works directly with file system. Enabling cache leads to better performance though consumes more memory.

  • indexCache saves in memory the country index only
  • memoryCache saves in memory full database file
  • checkForUpdates checks databases for updates (via fs mtime). Basically once you replace the old DB file with the new one module automamtically re-initialises.

Options can be passed to init method:

var maxmind = require('maxmind');
maxmind.init('/path/to/GeoIP.dat', {indexCache: true, checkForUpdates: true});

Performance / Benchmark

Caching significantly increases performance, refer to this camparison which was made on average laptop:

  • default: 20,000 lookups / second
  • indexCache: 115,000 lookups / second
  • memoryCache: 270,000 lookups / second

Following benchmark is made for GeoIPCity database. Memory caching is enabled where possible. If you believe that benchmark is not realistic please post a PR and share your code :)

node-maxmind  274649 op/sec
geoip-lite    191681 op/sec 43.28% slower
geoip         43483 op/sec  531.61% slower


Make sure you run npm i command in the project's dir before you begin, it'll install all dev dependencies. Currently code coverage is about 85%, so new tests are essential when you add new functionality. There're several npm tasks which you can find useful:

  • npm test runs tests
  • npm run lint runs js linter
  • npm run coverage runs code coverage task and generates report
  • npm run benchmark runs basic benchmark

One pull request per one feature, nothing unusual.




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