How can I check the location of a user based on ip adress

Well my question is in the topic. I just want to know how I can get some information for the people that visit my site from their ip adress

You can get that info from your statistics, but if you want to know more stuff and propably locate the user you can use this site : http://www.geobytes.com/IpLocator.htm

Like Nikolas, I would really recommend Geobytes' Ip Locator as well. For some reason, with other IP locators, my IP address will get shown as from India, but I'm from Singapore. Geobytes is the first IP locator that shows my IP add as from Singapore.

This is beause there are two editions of the geo ip database. The first is an old one which is free for everyone, and the second is updated every year (because some ips are gived by isps to other countries). It seems that this site uses the second one and actually it has the city edition which can tell the city that has this ip (working only for the usa).

You can also check out this site - http://www.ip2location.com/free.asp

www.theworldsend.net click IP Atlas

http://www.dnsstuff.com
It has a bunch of other tools as well.
Or you can use tools like NeoTrace to trace each node's location (very cool!)