You run a lookup on your IP address and it says you're in a city you've never been to. Or it shows the right country but a completely wrong region. Maybe it says you're in your ISP's headquarters city on the other side of the country.
This isn't a bug in the tool you used. It's a fundamental limitation of how IP geolocation works — and it affects every geolocation service on the planet.
Here's why it happens, how accurate geolocation actually is at each level, and what (little) you can do about it.
How IP Geolocation Works
Your IP address does not contain any location information. There's no GPS coordinate embedded in it. It's simply a number — a label assigned to your network connection.
Geolocation services work by consulting large databases that map IP address ranges to physical locations. Those databases are built from several sources:
- Regional Internet Registry (RIR) records — ARIN (North America), RIPE (Europe), APNIC (Asia-Pacific), LACNIC (Latin America), and AFRINIC maintain records of which organizations own which IP blocks. Those records include the organization's registered address.
- BGP routing data — analyzing which networks announce which prefixes and from where.
- Active probing — services like MaxMind and IP2Location actively probe addresses and use latency measurements to triangulate position.
- User-submitted corrections — some services let users submit corrections.
The key problem: none of these sources tell you where an end user actually is. They tell you where the IP block owner registered their address, or where the network is announced from. Those are very different things.
The Five Real Reasons Your Location Is Wrong
1. Your ISP Registered the Block in a Different City
This is the most common cause. When an ISP applies for a block of IP addresses from their regional registry, they list their corporate headquarters address or their primary network operations center. But they then assign those IPs to customers across hundreds of miles.
For example, a regional ISP headquartered in Dallas might assign IPs from that Dallas-registered block to customers in Austin, Houston, and San Antonio. Every single one of those customers will show as being in Dallas when looked up.
The ISP has no obligation to register sub-allocations with geolocation databases. Many don't.
2. CGNAT Clusters Thousands of Users to One Location
Carrier-grade NAT (CGNAT) makes this worse. Under CGNAT, your ISP uses a single public IP address for hundreds or thousands of residential customers. That IP is registered at the ISP's CGNAT gateway location — not at any of the users it serves.
If your ISP uses CGNAT (most mobile carriers and many residential ISPs do), your geolocation will point to wherever that gateway is located, which might be a data center in a completely different city.
You can check if you're behind CGNAT: run a CIDR lookup on your IP and see if the range is RFC 6598 (100.64.0.0/10), the reserved CGNAT block.
3. Mobile IPs Are Notoriously Inaccurate
Mobile carriers are the worst case. They run massive IP pools that span entire regions or countries, assigned dynamically as devices connect to towers. A carrier might have a single IP block covering all of California, and any cell connected anywhere in the state gets an address from that pool.
City-level accuracy for mobile IPs is around 38% — barely better than guessing among major cities. Country-level is still reliable, but anything more specific is essentially a coin flip for mobile users.
4. IP Blocks Get Sold and Reassigned
IPv4 addresses are scarce and valuable. Companies buy and sell them constantly. When a block changes hands — say, a bankrupt company sells its /16 to a new owner in a different country — geolocation databases don't update instantly.
MaxMind, the largest geolocation database provider, updates their database twice per week. But they still depend on being notified about reassignments. When an ISP in Brazil buys a block previously owned by a German company, that block will continue showing as German for weeks or months until databases catch up.
5. VPNs, Proxies, and Corporate Tunnels
If you're using a VPN, your traffic exits from the VPN server's location — and that's the IP that gets geolocated. A user in London connecting through a New York VPN server will show as being in New York.
The same applies to corporate VPNs. Employees working remotely often route all traffic through their company's central office, so their apparent IP location is their office, not their home.
This isn't a flaw — it's the point of a VPN. But it surprises users who forget they have a VPN active when checking their apparent location.
How Accurate Is IP Geolocation, Really?
The numbers vary by source, but here's a realistic picture:
| Level | Typical Accuracy |
|---|---|
| Country | ~99% |
| State / Region | ~80% |
| City | ~66% for broadband |
| City (mobile IPs) | ~38% |
| Street address | Not reliable at all |
Country-level geolocation is reliable enough for most purposes — blocking certain country codes, rough traffic analytics, basic fraud detection. City-level starts to get shaky. Anything more specific is not something you should trust for any decision that matters.
What Geolocation Is Actually Used For
Understanding the limitations helps you understand where it's appropriate:
Where it works well:
- Content delivery — serving users from the nearest CDN edge node (doesn't need to be exact)
- Rough analytics — "30% of our visitors are in Western Europe"
- Regulatory compliance at country level — GDPR, geo-restricted content
- First-pass fraud screening — flagging transactions from high-risk countries
Where it fails:
- Identity verification — "is this person actually in the city they claim?"
- Any use that needs street or building precision
- Billing or legal documents that require verified address
- Detecting individual users' movements
How to Check What Databases Think Your IP Is
Run your IP through our IP Lookup tool. You'll see the geolocation data that's currently associated with your address — city, region, country, ISP, and ASN.
You can also check WHOIS on your IP block to see the registered owner and address. That registered address is often exactly what geolocation services use.
Can You Fix a Wrong Geolocation?
Sometimes. The main databases accept correction requests:
MaxMind (the most widely used database, powers many geolocation APIs): Visit their correction submission form and submit your IP and correct location. They review and update within a few weeks.
Google uses its own internal data for location on Google services and maps. If your IP shows wrong in Google products, their correction path is less direct — they rely on their own signals including Wi-Fi positioning data from Android devices.
IP2Location and other providers each have their own correction processes. If your business depends on correct geolocation (e.g., you're an ISP), contact them directly about bulk corrections.
Note: corrections propagate to downstream users of those databases at different speeds. A fix in MaxMind doesn't instantly fix every site that uses MaxMind data — those sites cache the data locally and refresh on their own schedules.
The Bottom Line
Your IP address doesn't know where you are. The databases that try to figure it out are working from second-hand registration data, BGP routing tables, and inference — not from your actual physical location. For country-level, they're nearly always right. For city-level, they're right about two-thirds of the time for home broadband, and less than half the time for mobile.
If a website is behaving strangely based on your location — showing wrong currency, blocking content, or routing you to the wrong regional site — a VPN set to the correct country will solve it faster than waiting for database corrections.
Run our IP Lookup tool to see exactly what your current IP reveals, and Reverse DNS to see what hostname, if any, is tied to your address.