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IP location and accuracy

Can You Find Someone's Address From Their IP?

An IP address points to a network and a rough area, not a street. What a lookup actually reveals, why the city can be wrong, and where the legal limits are.

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4 min read

The short answer

No. An IP address identifies a connection on a network, and a lookup can tell you which ISP or organisation operates that network and roughly where its customers are. It cannot tell you who the customer is or where they live. Street-level identification requires the ISP's subscriber records, and those are released only to law enforcement with a court order or equivalent process.

What a lookup actually gives you

Country is the most reliable field and is right in the large majority of cases for fixed broadband. Region and city are estimates that get worse as they get more specific. ISP, organisation and ASN describe the network operator and are usually accurate because they come from registry records rather than guesses. Connection type, proxy, VPN and hosting flags describe the kind of network, not the person on it.

The latitude and longitude that come with a city result are the centre of the area the database associates with that range. Several databases place unknown locations at a country's geographic centre, which is how ordinary homes near such points have ended up receiving visits from people who trusted the coordinates.

Why the city is often wrong

Mobile carriers route traffic through gateways that may be in another city or another state, so a phone user appears wherever the gateway is. Carrier-grade NAT puts hundreds of subscribers behind one address. VPNs and proxies place the user wherever the exit server is registered. Business networks are frequently registered at a head office while the traffic comes from a branch. Databases also lag behind reallocations, so a range that moved to a new ISP can show its old home for months.

How investigators actually do it

Law enforcement pairs an IP address with an exact timestamp and serves the ISP with legal process. The ISP looks up which subscriber held that address at that moment and returns account details. Without the timestamp the request is meaningless on dynamic networks, and without the legal process the ISP does not answer. There is no shortcut around this for a private person, and services that promise one are selling the same approximate geolocation as everyone else.

What you can legitimately do

Find the network operator with a WHOIS or RDAP lookup and use its abuse contact to report harassment, spam or attacks; the operator can act on its own subscriber. Use the address as context in a fraud or security review alongside account history and behaviour. Keep the result in proportion: a match between an address's estimated city and someone's claimed location is weak evidence, and a mismatch is weaker still.

Do not use an approximate location to confront anyone or to publish where you think they live. Being wrong is likely, and being right does not make it lawful.

Sources

  1. MaxMind: Geolocation accuracy
  2. Electronic Frontier Foundation: Online privacy

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