The IP2Location is supporting 249 countries as recognized in ISO 3166. The IP2Location database has over 99.5% accuracy in country level detection and >75% of accuracy in city level. The inaccuracy is due to the dynamic IP address allocation by large ISPs such as AOL, MSN TV and other proxies. Due to the fact that AOL uses a network that routes all of the company's Internet traffic through Reston, Virginia, all IP-based geo-location services, including IP2Location, are unable to determine the state and city for people who dial into the AOL network. You can get the complete accuracy and coverage from data accuracy report page.