A public IP is not just a device identifier — it carries metadata about where the internet line was provisioned. See how servers use your IP to infer your country and approximate city or district.
When ISPs receive address blocks, they register service regions with authorities such as KISA. Global GeoIP companies (e.g., MaxMind) collect routing logs, user feedback, and DNS path data to build large IP location databases. Websites query these databases via API to match your IP to a country and city.
OTT platforms like Netflix and Disney+ use geo-blocking based on your IP to filter content without a license in your country. Banks and e-commerce sites trigger fraud detection (FDS) when logins come from unusual countries or regions, helping prevent account takeover.
Country detection is about 99.9% accurate, and state or province level is often over 90% accurate. Neighborhoods, street addresses, and building names cannot be determined from IP alone. Error ranges from a few kilometers to tens of kilometers. Displayed coordinates are usually a city center or the ISP's regional management server location.