With this tool, you can check and locate IP addresses for free. By default, you'll see your own information below. However, you can also click on the "Check other IP address" button and then enter an IP address or domain. This tool shows the provider, country, state (or region, province, etc.) and city.
While there is no limit on the queries, please use this tool within normal and reasonable limits (fair-use). Otherwise, I'll have to permanently block you from using this tool or from accessing my whole website.