IP Lookup Online

If you are analyzing a suspicious server log full of strange traffic, or trying to debug why a user in London is being routed to your New York server, you need to map their IP address to a physical location. This IP Lookup tool is built to instantly geolocate any IPv4 or IPv6 address.

BGP and Autonomous System Numbers (ASN)

The internet is just a massive web of networks talking to each other via the BGP (Border Gateway Protocol). Large organizations (like ISPs, universities, or cloud hosts) are assigned an ASN. When you look up an IP address, this tool doesn't just return a city; it queries global BGP routing tables to identify the exact ASN and corporate entity that owns that block of IP addresses.

The Accuracy of Geolocation

It is a common misconception that an IP address is tied to a specific street address. IP Geolocation relies on databases mapping IP blocks to the physical locations of ISP data centers. Country-level and State-level lookups are usually 99% accurate. However, City-level data can often be off by 50 miles, as your internet provider may route your traffic through a hub in a neighboring city.

Private vs Public IPs

You cannot geolocate an address like 192.168.1.5 or 10.0.0.1. These are 'Private' subnets used entirely inside your local WiFi network. To the outside world, all devices in your house share a single 'Public' IP address assigned by your modem.