How IP Geolocation Works: From IP Address to Map
By MyLocation.place · Updated August 2026
An explanation of how IP addresses get mapped to physical locations, the databases behind it, and why the accuracy is limited.
Type your IP address into a lookup tool and you'll see a city, region, and
sometimes a map pin. But how does a number like 192.0.2.1 become a geographic
location? The process involves several databases, network infrastructure data, and
statistical estimation — and the result is often imprecise.
Step 1: The IP Address Is Assigned by Your ISP
Every device connected to the internet is assigned an IP address, typically by its Internet Service Provider (ISP). In most home networks, the router requests a public IP address from the ISP, and all devices on the home network share that public IP behind a private local network (via NAT). This means your entire household or office appears as a single IP to the outside world.
Step 2: IP Ranges Are Registered and Published
Organizations like IANA and Regional Internet Registries (RIRs) divide the world's IP address space into blocks assigned to ISPs and other organizations. For IPv4, the five RIRs are:
- ARIN — North America
- RIPE NCC — Europe, Middle East, Central Asia
- APNIC — Asia-Pacific
- LACNIC — Latin America and Caribbean
- AFRINIC — Africa
These registries publish which ISP owns which block of addresses. This is the starting point for geolocation.
Step 3: Geolocation Databases Map IPs to Locations
The actual mapping from IP address to geographic coordinates is maintained by private databases, not by IANA. The major providers include:
- MaxMind GeoIP2 — one of the most widely used databases
- IPinfo — offers both database and API services
- DB-IP — provides commercial and free-tier databases
- IPIs — another commercial provider
These databases are built by combining:
- ISP data — registrations, routing tables, and network topology
- User contributions — crowdsourced data from users and partners
- WiFi network data — databases of WiFi access point locations
- Mobile carrier data — cell tower locations and roaming records
Why Accuracy Is Limited
IP geolocation is never 100% accurate because:
| Factors Limiting Accuracy |
|---|
| ISP routing design — Many ISPs route all subscriber traffic through one or two regional hubs. Everyone in a wide area appears to come from the same location. |
| Dynamic IPs — When ISPs recycle IP addresses among customers, the geolocation database may be outdated. |
| VPNs and proxies — These deliberately replace your IP with a server's IP, which geolocation databases correctly identify as the server's location. |
| Mobile networks — Mobile carriers route traffic through centralized gateway nodes, often in a different city than the user. |
| Database update frequency — Commercial databases are typically updated monthly; changes in ISP infrastructure may take weeks to reflect. |
Check your own IP
Use our IP Lookup Tool to see what location your IP address reveals.
What You Can Do About It
If you need precise location data, IP geolocation isn't sufficient. Consider:
- GPS coordinates from the device itself (requires user permission).
- Wi-Fi positioning services that use nearby WiFi networks.
- Cell tower triangulation for approximate indoor positioning.
For more on the differences between these methods, read our GPS vs IP Location guide.