IP Geolocation Explained

// What is IP Geolocation?

IP geolocation is the process of determining the approximate physical location of a device based on its IP address. When you visit a website, that website can see your IP address and — using a geolocation database — estimate which country, region, and city you are browsing from.

IP geolocation is not the same as GPS. It does not track your precise physical location. Instead, it estimates based on how IP address blocks are allocated and used. Accuracy varies widely depending on the level of detail requested.

// How Geolocation Databases Are Built

Companies like MaxMind, IP2Location, and DB-IP build geolocation databases by aggregating multiple data sources:

• RIR registration data — When ISPs receive IP blocks from regional registries (RIPE, ARIN, etc.), they declare which country the block is for.
• BGP routing data — Routing announcements reveal where IP blocks are being advertised from, hinting at their geographic location.
• Active network probing — Measuring round-trip latency from known locations helps triangulate where an IP is being served from.
• Traceroute analysis — Following the network path to an IP through routers with known locations narrows down the destination.
• Voluntary user submissions — Some databases incorporate user-corrected location data.
• ISP cooperation — Some providers share their IP-to-location mappings directly with database vendors.

Databases are updated continuously — MaxMind's GeoLite2, which we use, is refreshed twice per week.

// Accuracy by Detail Level

Geolocation becomes less reliable as you zoom in from country to street level:

Accuracy figures are typical industry estimates. Results vary by region, ISP type, and database vendor. MaxMind claims ~99.8% country accuracy and ~83% city accuracy for their commercial databases.

// Common Use Cases

• Content localisation — Showing websites in your language, local currency pricing, and region-appropriate news without asking you to specify your location.
• Streaming rights enforcement — Netflix, Spotify, and BBC iPlayer use geolocation to restrict content to licensed regions.
• Fraud detection — Banks flag transactions when your IP suggests you are in a different country from your usual location.
• CDN routing — Content Delivery Networks route your request to the nearest server, reducing latency. This decision is made using your IP's geographic location.
• Cybersecurity — Firewalls and WAFs can block or challenge traffic from high-risk regions. Security teams use geolocation to investigate incidents.
• Analytics — Website owners use IP geolocation to understand where their audience is without requiring login or cookie consent.
• Regulatory compliance — GDPR, data residency laws, and export controls sometimes require knowing where a user is located.

// Factors That Reduce Accuracy

VPNs and Proxies

When you use a VPN, your traffic exits from the VPN server's IP, not your own. Geolocation will show the VPN server's location (often a different country) instead of your actual location. This is how people bypass regional content restrictions.

Mobile Networks

Mobile carriers often route all traffic through centralised gateways in the country's capital or major cities. Your IP may appear to be in a city hundreds of kilometres from where you actually are.

Satellite Internet

Starlink and similar satellite providers assign IPs that may geolocate to a completely different country, since the IP blocks are allocated by the provider's home country rather than the user's location.

Corporate Networks

Large organisations route all employee traffic through a central office or data centre. Remote workers show as being at headquarters, not their actual location.

IP Address Reassignments

IP blocks are regularly reassigned between ISPs and customers. Geolocation databases may not immediately reflect these changes, leading to stale location data for recently transferred blocks.

// Geolocation vs GPS Location

These are fundamentally different technologies and should never be confused:

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