I am not exactly sure what you are asking, but just about any web analytics tool will show you the IP address. I use the free version of statcounter to track visitors and it always shows the IP address of the visitor. My web hosting service offers a couple of web log (webalyzer is one of them) tools and that also shows the IP addresses of the visitors.
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You can use statistics tool, if you have cpanel you will get awstats in it to track the IPs of your visitors.