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The MaxMind GeoIP City Database includes latitude and longitude. You could buy their "Web Service" at $20 per 50,000 queries...

• zkinion 18y ago
  I guess if you were really clever you could cache it too, if you had a site with a ton of traffic.
  • bluelu 18y ago
    Just hope that you get you get returning visitors then. And even then, address mappings change over time.