How Accurate Is IP Location Really? I Tested a Few Addresses
A friend asked me last week whether you could pin a person down from a single IP. I said, roughly down to the city. He did not believe me, and honestly I was not sure either, so I pulled out a handful of addresses and ran a small test, writing down every result. Reading it back, the one who lost the argument was me.
I had assumed ip location accuracy meant being off by a few miles at most, all within the same city. Then I saw that some IPs landed on the right district while others were hundreds of miles away, sometimes in a completely different province.
How I Ran the Test
Nothing fancy, just careful notes:
- Collect a few types: home broadband, mobile data, a hosting server, and one proxy line
- Pick a single moment and run each IP through lookup sites
- Write the returned city next to the location I actually knew
- Run it again a few hours later to see whether the answer drifted
I kept it deliberately boring: same sites, same order, same time of day, so the only thing changing between runs was the address itself.
The Results: Three Types, Three Behaviors
| Address type | Typical error |
|---|---|
| Home broadband IPv4 | Mostly the same city, sometimes the right district |
| Mobile data | Often labeled as the provincial capital, off by dozens to hundreds of miles |
| Hosting / proxy | Shows the datacenter's registered location, not where it is used |
The mobile one surprised me most. I was physically in a small city and every lookup said the provincial capital, over two hundred miles away. I assumed the tool was broken, tried three different sites, and got the same answer each time. The home broadband row was the pleasant surprise, sometimes landing on the exact district, which is more than I had hoped for going in.
Why Some Are Sharp and Some Are Way Off
After digging around I understood it comes down to how the database is built. Home broadband blocks are fairly fixed and registered in detail, so they read accurately. Mobile traffic exits through a huge shared pool, and the registered point the carrier reports is usually the capital's core, so it drifts. Hosting IPs are the most literal: their registration really is the datacenter. So there is no single accuracy number for the whole internet. There is an accuracy number per address type, and it changes as carriers reshuffle their pools. Ask someone "how accurate is ip location" without naming a type and the honest answer is: it depends, give me the address. If you want the full story on what is actually being recorded, I broke it down in what an IP registration record really holds.
Can ip location Get to the Street
No, do not believe anyone who says so. Anyone claiming street-level or door-level precision is selling you a story. City level is normal, district level is a good day, and street level exists only in vendor ads. If you just want to confirm your own exit point, start by fetching your current address, and the steps are in how to check your public IP. Keep your expectations at the city, and you will rarely be disappointed.
If You Want to Compare for Yourself
I turned the method into a routine, and even ran a more formal side-by-side comparison across lookup sites. If you only take one thing from my little experiment, take this:
- Feed the same IP to at least three different sites and see how far they disagree
- Re-run after some time to watch whether the answer wanders
- Treat "did it hit the right city" as the pass mark, never street level
Run that for a week and you will trust any single result a lot less, which is the correct instinct.
The Bottom Line
The reliable range for ip location is roughly the city, occasionally the district, and street level is pure imagination. Home broadband reads better, mobile and hosting drift more. That is not a flaw in the technology, it is just how the underlying records were built. Next time someone waves a single IP at you and says "he lives right here," smile, run the lookup twice, and only then decide what to believe. It is a hint, never a verdict. The gap between what people expect from ip location and what it can actually deliver is where most of the bad calls come from. Close that gap and you stop being surprised.