Public IP vs Private IP: What's the Difference?
Updated June 3, 2026
Every device on the internet actually works with two kinds of IP address at once: a public one and a private one. Knowing the difference clears up a lot of confusion — like why the address on our home page doesn't match the one your computer reports.
Public IP address
Your public IP is assigned by your internet service provider (ISP). It's the address the rest of the internet sees, and it identifies your whole network — not a single device. Every website you visit sees this address. It's the one we show on the home page, and the one that reveals your approximate geolocation and ISP.
Example: 203.0.113.42
Private IP address
A private IP is assigned by your router to each device on your local network — your laptop, phone, smart TV and so on. These addresses only work inside your network and are never visible to the outside internet. The same private ranges are reused on millions of home networks worldwide.
Private addresses always fall in these reserved ranges:
10.0.0.0–10.255.255.255172.16.0.0–172.31.255.255192.168.0.0–192.168.255.255
Your router itself usually sits at 192.168.0.1 or 192.168.1.1 — see
how to find your router's IP.
How NAT ties them together
So how do many devices, each with a private IP, share a single public IP? Through a technique called NAT (Network Address Translation). Your router keeps a table of which internal device made which request, swaps the private source address for the public one on the way out, and reverses it on the way back. To the internet, all your traffic appears to come from one public address.
| | Public IP | Private IP |
|---|---|---|
| Assigned by | Your ISP | Your router |
| Visible to the internet | Yes | No |
| Identifies | Your whole network | One device on your LAN |
| Example | 203.0.113.42 | 192.168.1.5 |
Why it matters
- Privacy: only your public IP is exposed online. To mask it, use a VPN or other methods to hide your IP.
- Networking: port forwarding and local device access rely on private IPs.
Key takeaways
- Public IP = assigned by your ISP, seen by the internet, identifies your network.
- Private IP = assigned by your router, used only on your local network.
- NAT lets many private devices share one public IP.