Free IP address locator service. This well made website also has some other useful scripts and tools unrelated to the topic of how to locate an IP Address. currently offline
Geolocation provider with a somewhat chaotic but useful website. They offer free tools and scripts, some provided as adware and lots of service plans and geolocation ideas. Locating accuracy leaves room for some improvement, however, but this is a problem common to all companies.
Professional provider of geolocation data with limited, free demo access. For a yearly fee, you may download periodically updated databases covering country, region, city and ISP information.
Professional provider of geolocation data with limited free IP address query. They are targeting their services toward advertising, weblog analysis, website customization and credit card fraud prevention.
