Your WAN IP is the public address your internet provider gives your router, while your LAN IP is the private address your router gives to devices inside your home or office. That is the core difference. Public addresses must be unique on the internet. Private addresses, such as 192.168.x.x, 10.x.x.x, and 172.16.x.x to 172.31.x.x, are reserved for local networks under RFC 1918 [source: IETF].
TLDR: Your WAN IP is what websites, game servers, VPNs, and remote services see. Your LAN IP is what your router uses to talk to your laptop, phone, printer, or smart TV at home. For example, your router may have a WAN IP like 73.44.10.25, while your laptop uses 192.168.1.24. In a small office with 25 devices, all 25 can share one public WAN IP, which saves public address space and keeps internal devices less exposed.
WAN IP vs LAN IP in plain terms
A WAN IP, often called a public IP address, sits on the internet-facing side of your router. WAN means Wide Area Network. In most homes, that “wide area” is your internet provider’s network and the wider internet beyond it.
A LAN IP, or private IP address, sits inside your local network. LAN means Local Area Network. Your router gives LAN IPs to devices so they can talk to each other and reach the internet through the router.
Here is the simple version:
- WAN IP: Used outside your network. Visible to websites and remote services.
- LAN IP: Used inside your network. Seen by your router and local devices.
- Router: Sits between both sides and passes traffic back and forth.
Why your devices do not all have public IPs
Most homes have many devices but only one public IPv4 address. That is normal. Your router uses NAT, short for Network Address Translation, to let many private devices share one public WAN IP.
Honestly, it feels like networking names were made harder than they needed to be. But NAT is easy to picture. Your router works like a front desk. Devices inside ask for websites. The router sends the request out using the WAN IP. When the reply comes back, the router remembers which device asked and sends the data to the right LAN IP.
So your phone, laptop, console, and smart speaker may all appear online as the same public IP. Inside your home, though, each one keeps its own private LAN IP.
Common examples of WAN and LAN IPs
Your WAN IP could look like this:
- 82.14.203.77
- 104.28.12.91
- 203.0.113.45
Your LAN IP usually looks like this:
- 192.168.0.12
- 192.168.1.50
- 10.0.0.8
- 172.16.5.20
That difference matters. If you are setting up a printer, file share, or game console at home, you usually need the LAN IP. If you are setting up remote access from outside your home, you usually need the WAN IP.
How to find your WAN IP
The fastest way is to search for “what is my IP” in a browser. You can also log in to your router and check the internet or WAN status page.
Expect to waste time on some router admin pages. A few hide the WAN IP under vague labels like Internet Address, IPv4 Address, or Gateway Status. It should take 10 seconds. Sometimes it takes five minutes because the menu names are awful.
Be careful with privacy. Your WAN IP can reveal your rough location and internet provider. It usually cannot show your exact home address to a random website, but it is still not something to post in a public forum without a reason.
How to find your LAN IP
Your LAN IP is found on the device itself or in your router’s device list.
- Windows: Open Command Prompt and type ipconfig. Look for IPv4 Address.
- Mac: Open System Settings, then Network, then select your connection.
- iPhone: Open Wi-Fi settings, tap the connected network, and look for IP Address.
- Android: Open Wi-Fi details for the connected network.
- Router: Check the connected devices or client list.
Static addresses, changing addresses, and why that matters
Your WAN IP may change over time unless your provider gives you a fixed public IP. Many home connections get a new public IP after a modem restart, service change, or network update.
Your LAN IP can also change. Your router usually assigns it through DHCP. That is fine for phones and laptops. It can be annoying for printers, security cameras, NAS devices, and servers.
For those devices, use a DHCP reservation in your router. That tells the router to give the same LAN IP to the same device every time. It is cleaner than setting the IP by hand on the device.
Security difference: public exposure vs private space
Your WAN IP is exposed to the internet. That does not mean your devices are open by default. Your router blocks most incoming traffic unless you allow it.
Your LAN IPs are not directly reachable from the public internet. A website cannot connect straight to 192.168.1.24 in your home. That address may also exist in millions of other homes. Private IPs are reused everywhere, by design.
Still, do not treat your LAN as risk-free. Weak router passwords, old firmware, unsafe port forwarding, and exposed cameras can create real problems. CISA advises users to secure home routers with strong passwords and updates [source: CISA].
When you need each address
- Use your WAN IP for remote access, VPN setup, firewall rules, hosting a service, or checking how the outside internet sees you.
- Use your LAN IP for printers, local file sharing, router settings, smart home hubs, cameras, and device troubleshooting.
- Do not confuse them when setting port forwarding. You forward traffic from the WAN side to a specific LAN IP.
The practical rule is simple: WAN is outside. LAN is inside. If someone outside your network needs to reach you, the WAN IP matters. If a device inside your home or office needs to be found, the LAN IP matters. Once you see your router as the border between those two worlds, the whole thing becomes much less confusing.