Published at LXer:

If you maintain a portal, ecommerce site, or heavily trafficked Web site, you might appreciate the ability to identify the geographical location of your site visitors. Geolocation information can help you localize content, serve relevant local advertisements, offer a download mirror close to visitors, and detect online fraud. Techniques like whois lookup of IP addresses are of some help, but they don't always find accurate locations. A better approach is a database that maps each IP address to a location -- such as MaxMind's GeoIP.

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