Your Public IP Address
Instantly find your public IP address, country, and device details
When you visit any website, your device sends a request through your Internet Service Provider (ISP). This request includes your public IP address, which is assigned by your ISP. Our tool reads this IP address from the server request headers and displays it to you instantly.
Your IP address can reveal your approximate geographic location (country and city), your ISP, and whether you are using IPv4 or IPv6. It does not reveal your exact street address, name, or personal information.
IPv4 addresses look like 192.168.1.1 and are the most common format. IPv6 addresses are longer (like 2001:db8::1) and were created to provide more unique addresses as IPv4 addresses run out.
| IPv4 | IPv6 | |
|---|---|---|
| Looks like | 203.0.113.42 | 2001:db8:85a3::8a2e:370:7334 |
| Length | 32 bits — about 4.3 billion addresses | 128 bits — effectively unlimited |
| Written as | Four decimal numbers, 0–255 | Eight groups of four hex digits, zeros collapsible |
| Typical home setup | One shared public address behind NAT | A whole prefix, often /56 or /64 |
| Why it matters | Everyone on your network shares one address | Devices can have their own routable address |
| Range | Use |
|---|---|
| 10.0.0.0 – 10.255.255.255 | Private — large networks |
| 172.16.0.0 – 172.31.255.255 | Private — the range people forget |
| 192.168.0.0 – 192.168.255.255 | Private — almost every home router |
| 100.64.0.0 – 100.127.255.255 | Carrier-grade NAT — common on Indian mobile data |
| 127.0.0.0/8 | Loopback — this machine |
| 169.254.0.0/16 | Link-local — means DHCP failed |
| They can see | They cannot see |
|---|---|
| Your internet provider or mobile operator | Your name |
| Your approximate city or region | Your street address |
| Whether you are on mobile data, broadband or a data centre | What you are browsing |
| That several requests came from one connection | Which device on your network sent them |
| Whether the address belongs to a known VPN or proxy | Anything stored on your machine |
You are in Pune and the lookup says Mumbai.
Geolocation databases map address blocks to the place the operator registered them, not to where the handset is.
Mobile operators route large regions through a small number of gateways, so an entire state can present as one city.
Carrier-grade NAT puts thousands of subscribers behind a single public address.
City-level accuracy is roughly 55 to 80 per cent on fixed broadband and much worse on mobile. Treat it as a hint.
No. Public geolocation resolves to a city or region at best, and often to the wrong one. Only your internet provider can map an address and a timestamp to a subscriber line, and they release that to law enforcement on a valid legal request, not to the public.
Home broadband almost always uses dynamic addressing: the provider leases you an address and reassigns it when the lease expires or the connection drops. On mobile data it can change as you move between network gateways. A fixed address is normally a paid static-IP add-on.
The private one - usually starting 192.168 or 10 - is what your router gave your device and is only meaningful inside your own network. The public one belongs to your router and is what every website sees. Several devices in a house share one public address through NAT.
No. A VPN or proxy replaces the address a site sees, which defeats the crudest kind of tracking. Cookies, browser fingerprinting, and simply being signed in to an account identify you regardless of which address the request came from.
Detection works from address reputation lists, and those lists go stale. Business broadband, mobile carrier-grade NAT and recently reassigned data centre ranges all get flagged by mistake. Restarting the router to pick up a new address usually clears it.
This page reads only the address your connection presents to this server. Nothing is stored.
Go deeper
The calculator gives you the number. These SnoopTool guides explain the method, the assumptions and the decision — with worked examples, data tables and FAQs.
Browse all SnoopTool guides →Questions this lookup answers in full, with the reference tables.
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