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What can someone do with your IP address?

Sorted into what is true, what is false, and what is technically true but written to alarm you.

Part of Privacy and What Your IP Reveals Updated September 2026 About 10 minutes

Start with what an address is

An IP address is a destination, the way a street address on an envelope is a destination. Knowing where to send something is not the same as having a key to the building, and almost every exaggerated claim in this area quietly conflates the two.

Your address is also not secret. Every website you load has it, because it cannot send a page back without it. So does every font, ad and analytics script inside those pages. That is not a leak, it is how the protocol works, and it is why our front page can show it to you without asking you anything.

What an IP address does and does not reveal An IP address generally reveals your internet provider, a rough area, and the type of connection. It does not reveal your name, your street address, which device you used, or what you were doing. What it generally does reveal Your internet provider, by name Your country, almost always correctly A region, often correctly A city, roughly half the time Home, mobile, business or data center What it does not reveal Your name Your street address Which device in your home What you were doing Anything you typed or opened The one record that connects an address to a person Your provider knows which customer held an address at a given moment. That record is not public, and getting it normally takes a subpoena or a court order.
The left column is public and takes seconds to look up. The right column is not derivable from an address by anyone, regardless of skill or tooling.

True: things people can genuinely do

Estimate where you are, roughly

Country is close to reliable. Region is decent. City is about a coin flip, and much worse on mobile, satellite or VPN connections. Read how geolocation works for why the guess exists at all when nothing in the address encodes a place.

Identify your internet provider

Address blocks are registered publicly to the organizations that hold them. Looking up which company owns the block containing your address takes one query and no special access.

Tell that you are on a VPN, a data center, or a mobile carrier

Those ranges are catalogued and widely available. This is why some sites block VPN users, and why signing in from a data center address triggers extra verification.

Flood your connection to knock you offline

The real one. Directing enough traffic at your address can saturate your line and make it unusable until the traffic stops. It needs no access to your network and no vulnerability on your part. It affects the connection rather than your devices, nothing is stolen, and it ends when the attack ends or your address changes.

Probe anything you have deliberately exposed

If you have opened a port for a game server, a camera or remote access, that service is reachable. Worth knowing: the entire address space is scanned continuously by automated systems, so exposed services are found regardless of whether anyone has your address specifically. Someone having it does not meaningfully change your exposure here. Closing unused rules and patching what you keep does.

False: things repeated constantly that are not true

"They can find your home address"

Not from the address. The record linking an address to a subscriber sits with your provider and normally requires a subpoena. Covered properly in can someone find me from my IP.

"They can hack your computer with it"

An address tells someone where to send traffic. Getting into a machine requires a service that is both exposed and vulnerable, which is a separate condition that has to be true independently. If nothing is listening, there is nothing to attack. This claim survives because it sounds plausible and because the people repeating it are often selling something.

"They can read your messages or see your screen"

No. An address carries no access. Traffic to sites you visit is encrypted between you and them, and an observer holding your address is not on the path anyway.

"They can steal your identity with it"

An address is shared by your household, changes on its own, and contains no personal information. It is one of the least useful pieces of data for this purpose.

"Incognito mode hides it"

Private browsing affects what your own browser stores. It changes nothing about what the network sees, and every site still receives your address exactly as before.

True but misleading: the claims worth unpacking

"Your IP address identifies you"

It identifies a connection, shared by everyone in your home, and it changes over time. It is one signal among several and the weakest of them, which is exactly what makes the next point matter.

How long each identifier follows you An IP address changes on its own and is shared by a household. A cookie lasts until it is cleared. A browser fingerprint survives clearing cookies. A logged-in account identifies you outright. Changing your IP address addresses only the weakest of the four. Changing your IP address moves the least sticky of the four IP address days to months Changes on its own, and everyone in your home shares it. Cookies until cleared You can delete these, and a new address does not. Fingerprint survives clearing Built from your fonts, screen, timezone and hardware quirks. Logged in it is just you No inference needed. You told them who you are. Bars show rough persistence, not a measurement. The ordering is the point.
Anyone offering an address change as anonymity is offering to move the least sticky of the four. Cookies survive it, a fingerprint survives clearing cookies, and being logged in skips the guessing entirely.

"Advertisers track you by IP"

They use it, mostly for coarse regional targeting and for fraud signals. The heavy lifting in ad tracking is done by cookies, identifiers and fingerprinting, all of which are more precise and more durable. Changing your address is not the lever people think it is.

"Websites log your IP"

True, and normal. Server logs record the address, the time and the page, because that is what makes it possible to debug an outage or notice an attack. It is also why our privacy policy says our CDN keeps ordinary access logs. Logging is not surveillance, though it is worth knowing it happens.

"A VPN makes you anonymous"

A VPN changes which address websites see. It does not clear cookies, alter your fingerprint, or log you out of anything. It also moves your traffic from your provider's view to the VPN company's, which is a transfer of trust rather than a removal of it. Useful, and not the same as anonymous.

So how worried should you be?

A reasonable position, given all of the above.

Where to swim next

Can someone find me?The honest answer, and why lookup sites cannot do what they claim. The privacy pillarWho sees your address, what helps, and what to do if it is exposed. Public vs privateWhy everyone in your home shares one address. How geolocation worksWhere the location guess comes from, and why it misses.