What Is My IP Address, and Who Can See It?
A plain-English look at your public IP address: what it reveals about you, why it keeps changing, and how to hide it when you want to.
“What is my IP” is one of the most-searched questions on the internet, which is a little funny, because the answer is already visible to every website you open. The What Is My IP tool just puts it front and centre: your public address loads the second the page does.
What the number actually is
Your IP is a return address. When you request a page, your device stamps it on the request so the server knows where to send the reply. Without it, the response would have nowhere to go. So it isn’t secret information leaking out — it’s a required part of how the connection works.
What surprises people is how much rides along with it. The address maps to your internet provider and a rough geographic area, and it’s written into the access logs of basically every site and service you touch.
Who sees it, and what they do with it
More things than you’d guess:
- Every website you visit, logged automatically by the web server.
- Ad and analytics networks embedded in those sites, which use it as one signal for rough location and rate limiting.
- Game servers, email servers, and anything else you connect to directly.
None of this needs your permission, because the address is part of the request itself. That’s the trade: an open internet where any server can reply to you also means any server can see who’s asking.
Why it keeps changing
Check your IP today, check it next week, and it may well be different. A couple of reasons:
Most home connections use dynamic IPs. Your provider owns a pool of addresses and leases you one, then reshuffles it every few days or whenever your router reconnects. Businesses often pay for a static IP that stays put, because they’re hosting something that needs a fixed address.
On mobile data it’s messier. Carriers route thousands of phones through shared gateways, so your “IP” is really the carrier’s, and it can hop as you move between towers.
The IPv4 and IPv6 thing
If your address looks like 203.0.113.7, that’s IPv4 — four numbers, the format everyone recognises. If it looks like 2001:4860:4860::8888, that’s IPv6. We simply ran out of IPv4 addresses; there are only about 4.3 billion, and the world blew past that number of connected devices years ago. IPv6 has enough room that nobody’s counting. The tool shows whichever your connection is using.
Can someone find me from it?
Not your front door. An IP resolves to a city or a nearby routing point, plus your provider — useful for a rough guess, useless as a home address. If you want to test that, an IP Address Lookup will show the location any address maps to, and it’s usually the ISP’s location, not yours.
For an actual precise position, a site needs the browser’s Geolocation API and your explicit permission, which is a different mechanism entirely.
Hiding it
If you’d rather sites didn’t see your real address, route your traffic through a VPN or proxy. The site then sees the VPN server’s IP instead of yours. Check the tool before and after connecting — watching the address, city, and provider all change is the clearest proof a VPN is doing its job.
Curious what you’re broadcasting right now? Open What Is My IP and it’s already there.