How to distinguish UK visitors?

[musicales]

Does anyone know of a software component of some kind that I can use to distinguish the geographical location of visitor IP addresses. I want to offer different services to UK visitors. I know the IP system is only roughly geographic but I have seen examples of this kind of thing out there, just don't know how to do it.
Thanks
David

[Mike_Mackin]

Found a UK Firm
see your SM

Do your visitors come from the UK, France or Germany? Which company are they from? Which search engine did they use? The origin of your visitors helps to define the content that your website provides or the areas to target a Direct Mail campaign. It can even be a factor in your company's geographical location. Nedstat recognises the importance of this information. The extensive monitoring and updating of our own IP database reflects this.

At the moment, they have more than 900,000 IP ranges (between one and ten thousand IP addresses) registered, which make the IP database the largest of its kind.

[Iguana]

Browsers have properties that tell you the language e.g. en-gb (in Internet Explorer navigator.userLanguage property). But you will find that many UK machines still have the default en-us.

A further complication is that Netscape 4, from what I remember, just used en for english. IN that case I used to get the timezone from the browser setting to separate US from UK.

These browser settings are available from javascript (or server-side ASP)

[musicales]

Hey Iguana - you're an absolute star - that's just what I was after - approximately correct is good enough for me!
Thanks a lot