.netCOUNTRY provides location, language and culture analysis in real-time for your ASP.NET web site. Locate visitors and convert their IP and browser details to country code, country name, language code, language name, culture code, currency and more!   Code: ASP.NET v1.0

Using 4AspNet IPInfo .NET Component you can easy find which countries your visitors are from, prevent credit card fraud, auto select counties on dropdowns by IP and lots more (country code, name, capital, currency info, flags...)!   Code: ASP.NET v1.1 & C#

IP2Location(tm) is an active server component that translates IP address to country. Developers use this component for projects related to web, and client applications.   Code: ASP.NET v1.0 & VB

IP2Location .NET component translates IP address to country, city, region, latitude, longitude, ZIP code, ISP and domain name. Developers can use it for projects related to web and client applications. Demo version has 5-second random delay.   Code: ASP.NET v2.0