To show your public IP address, visit a site like WhatIsMyIPAddress.com or IPInfo.io. These services display your public IP instantly. Your public IP is the address assigned to your router by your internet service provider (ISP).
Every device connected to the internet needs an IP address to communicate. When your router connects to the internet, your ISP assigns it a public IP address. This address identifies your network to websites and other online services.
Your public IP is different from your private IP. Private IPs are used within your local network (like 192.168.x.x) and are invisible to the outside world. Public IPs are visible to websites and used to route data back to your network.
There are several reasons to check your public IP:
Many people confuse their public IP with their private IP. Your private IP is used within your local network and is not visible to the outside world. For example, if you have multiple devices connected to your router, each will have its own private IP (like 192.168.1.2 or 10.0.0.3), but they will all share the same public IP assigned by your ISP.
Another common misconception is that your public IP is permanently assigned to you. In reality, most ISPs use changing IP addressing, which means your public IP can change over time. If you need a static IP, you'll typically have to pay extra for it.
Imagine you're setting up a home security camera that allows remote viewing. To access the camera from outside your home network, you'll need to know your public IP address. You'd enter this address into the camera's settings along with the port number to establish a connection. Without knowing your public IP, you wouldn't be able to access the camera remotely.
I recently helped a friend set up a smart thermostat that required port forwarding. We visited WhatIsMyIPAddress.com to find his public IP, then entered it into the thermostat's settings. This allowed him to control the thermostat from his phone while he was away from home.
Once you know your public IP, you can use it for various purposes. For example, you can set up port forwarding to access devices on your local network from outside. You can also use it to troubleshoot network issues or check your security settings.