Public vs Private IP Address: What Is the Difference?
When you check your IP address, you may notice something confusing: your device can have more than one IP address.
Your laptop might show a local address like 192.168.1.24, while a website shows something completely different. Both can be correct.
The difference is usually public IP address vs private IP address.
If you only need the address websites can see, open the T.LY What Is My IP Address tool. It shows your public IP address, approximate location, ISP, ASN, and VPN or proxy status.
What is a public IP address?
A public IP address is the address your internet connection uses on the public internet.
When you visit a website, send a request to an API, join a video call, or scan a QR code that opens a web page, the destination server usually sees a public IP address for your connection.
Public IP addresses are useful for:
- remote access rules
- firewall allowlists
- support tickets
- security logs
- website analytics
- VPN checks
- network troubleshooting
If support asks, "What IP are you connecting from?", they usually mean your public IP address.
What is a private IP address?
A private IP address is used inside a local network, such as your home Wi-Fi, office network, or phone hotspot.
Common private IPv4 ranges include:
10.0.0.0to10.255.255.255172.16.0.0to172.31.255.255192.168.0.0to192.168.255.255
These addresses are not normally reachable directly from the public internet. Your router uses them to keep track of the devices on your network.
For example:
- your laptop might be
192.168.1.24 - your phone might be
192.168.1.25 - your printer might be
192.168.1.40 - your router might be
192.168.1.1
Those local addresses help the devices talk to the router and to each other.
Why public and private IP addresses are different
Most home and office networks use a router between your devices and the internet.
Your devices use private IP addresses inside the network. The router then sends internet traffic out through the public IP address assigned by your internet service provider.
This is why several devices in one house can appear to websites as the same public IP address. The website usually does not see each device separately. It sees the public address used by the connection.
Which IP address do websites see?
Websites usually see your public IP address.
They do not normally see the private address your laptop or phone uses on Wi-Fi.
That matters because your operating system may show your private IP, while a web-based IP checker shows your public IP. They answer different questions.
Use the What Is My IP Address tool when you need the public address visible to websites.
Use your device network settings when you need the local private address used inside your Wi-Fi network.
Can a private IP address be reused?
Yes. Private IP addresses are reused constantly.
Millions of routers use addresses like 192.168.1.1 or 10.0.0.1 inside local networks. That is fine because those addresses are not globally unique on the public internet.
Public IP addresses are different. They need to be routable on the internet, so they are assigned and managed by networks and internet providers.
How VPNs affect public IP addresses
When you connect through a VPN, websites may see the VPN server's public IP address instead of the public IP address assigned by your normal ISP.
That is a quick way to check whether a VPN is working:
- Visit What Is My IP Address with the VPN off.
- Write down the public IP, location, and ISP.
- Turn the VPN on.
- Reload the page and compare the results.
If the public IP and network details changed, your traffic is likely going through the VPN.
Why your IP location may not match your real location
Your public IP address can suggest a general location, but it is not GPS.
IP location can be wrong because:
- your ISP routes traffic through another city
- mobile networks use regional gateways
- corporate networks centralize traffic
- VPNs or proxies change the visible network
- geolocation databases are outdated
If the city looks wrong, that does not always mean something is broken.
Public vs private IP address summary
| Type | Where it is used | Who can usually see it |
|---|---|---|
| Public IP | Internet connection | Websites, APIs, online services |
| Private IP | Local network | Devices and routers on the same network |
The short version:
- Public IP addresses are used on the internet.
- Private IP addresses are used inside local networks.
- Websites normally see your public IP address.
- Your router and devices use private IP addresses locally.
If you need the public IP address your current connection is using, check it with the T.LY What Is My IP Address tool.
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Tim Leland
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