How do you detect a website visitor's country (Specifically, US or not)?

Question

I need to show different links for US and non-US visitors to my site. This is for convenience only, so I am not looking for a super-high degree of accuracy, and security or

Answer 1

I would say that geotargetting is the only method that's even remotely reliable. But there are also cases where it doesn't help at all. I keep getting to sites that think I'm in France because my company's backbone is there and all Internet traffic goes through it.

The HTTP Accept Header is not enough to determine the user locale. It only tells you what the user selected as their language, which may have nothing to do with where they are. More on this here.