What your system IP address is and why you need it
Your system IP address is the number your computer uses to talk to other devices on your home network and the internet. It looks like four numbers separated by dots — for example, 192.168.1.5. When you're setting up a home network or troubleshooting a connection problem, you'll often need to know this number so you can log into your router, access another device on the network, or give technical support the information they need.
Every device on your network has its own IP address. Your computer might be 192.168.1.5, your phone might be 192.168.1.10, and your printer might be 192.168.1.20. Your router assigns these addresses automatically using something called DHCP. Knowing your own address helps you understand where your device sits on the network and makes it easier to find other devices when something isn't working.
Key Takeaways
- On Windows, open Command Prompt and type ipconfig to see your IP address listed as "IPv4 Address" under your network adapter.
- On Mac, go to System Settings, click Network, select your connection, and look for the IP address shown in the connection details.
- On Linux, open a terminal and type hostname -I or ip addr to display your IP address.
- Your IP address usually starts with 192.168 or 10.0 on a home network, and changes only when you restart your computer or your router reassigns it.
- If you need a permanent address for a device, you can set a static IP in your router settings instead of relying on the automatic assignment.
Finding your IP address on Windows
Open the Start menu and type Command Prompt into the search box. Click on Command Prompt when it appears. A black window will open with a blinking cursor.
Type ipconfig and press Enter. The window will display a list of network adapters on your computer. Look for the section labeled with your network connection name — usually "Ethernet" if you're plugged in with a cable, or "Wireless LAN adapter" if you're using Wi-Fi. Under that section, find the line that says IPv4 Address. The number next to it is your system IP address.
If you see multiple adapters listed, ignore the ones labeled "Loopback Pseudo-Interface" or "Virtual" — those are internal to Windows and not your actual network address. Your real address will be under the adapter you're actually using to connect.
Finding your IP address on Mac
Click the Apple menu in the top-left corner and select System Settings. In the sidebar, click Network.
You'll see a list of connection types on the left side. Click whichever one you're using — Wi-Fi if you're wireless, or Ethernet if you're plugged in with a cable. On the right side, you'll see the connection details. Look for the line labeled IP Address. That's your system IP address.
If you want more detail, you can click the Details button to see additional network information like your subnet mask and router address. For most purposes, the IP address shown on the main screen is all you need.
Finding your IP address on Linux
Open a terminal window. The method varies by desktop environment, but usually you can right-click on the desktop and select "Open Terminal" or press Ctrl+Alt+T.
Type hostname -I and press Enter. Your system will display your IP address when ready. This is the fastest method if you just need the number and nothing else.
If you want more detailed information about your network setup, type ip addr instead. This shows all your network adapters and their addresses. Look for the section labeled "inet" under your active connection — that's your IPv4 address. Ignore "inet6" addresses, which are for IPv6 and look completely different.
Understanding what the numbers mean
Home network IP addresses almost always start with either 192.168 or 10.0. These are private IP ranges reserved for home and office networks. The numbers after that identify your specific device. So 192.168.1.5 means you're on a 192.168.1 network, and your device is number 5 on that network.
Your router typically assigns addresses in order — the first device gets .2, the second gets .3, and so on. The router itself usually takes .1. This is why your computer might be 192.168.1.5 while your phone is 192.168.1.10. The exact numbers don't matter for normal use, but they help you identify which device is which when you're looking at your router's list of connected devices.
If you see an address that starts with something else — like 172.16 or 10.0 — you're still on a private network, just using a different range. Some routers use these ranges instead of 192.168. The important thing is that it's a private address, not a public one you'd use on the internet.
When your IP address changes
Your system IP address usually stays the same as long as your computer stays connected to the network. However, it can change if you restart your computer or if your router restarts. When that happens, your router assigns a new address from its pool of available numbers.
This automatic assignment is called DHCP, and it's the default for most home networks. If you need a device to always have the same IP address — for example, if you're setting up a network printer or a security camera — you can set a static IP address in your router settings. This tells the router to always give that device the same number, even after a restart.
Setting a static IP requires logging into your router's admin panel, which is a separate process from finding your current address. Most routers have this option in their DHCP settings or under "Reserved IP" or "Static Lease" sections.
Troubleshooting when you can't find your address
If you run the commands above and don't see an IP address, your computer isn't connected to the network. Check that your Wi-Fi is turned on or that your ethernet cable is plugged in. On Windows, look at the network icon in the bottom-right corner — it should show a connected status. On Mac, check the Wi-Fi icon in the top-right corner. On Linux, check your network manager in the system tray.
If you're connected but still don't see an address, restart your computer and try again. Sometimes the network adapter needs to be reset. If the problem continues, restart your router by unplugging it for 30 seconds, then plugging it back in. Wait a minute for it to fully start up, then check your IP address again.
If you see an address that starts with 169.254, your computer is connected to the network hardware but hasn't received an address from the router yet. This usually fixes itself within a minute or two. If it persists, restart your computer and router.
Frequently Asked Questions
Is my IP address the same as my public IP address?
No. Your system IP address (like 192.168.1.5) is private and only works on your home network. Your public IP address is assigned by your internet provider and is what websites see when you browse. To find your public IP, search "what is my IP" in any web browser.
Can someone hack me if they know my IP address?
Your system IP address alone is not a security risk — it's only useful on your local network. Your public IP address is visible to every website you visit, and that's normal. However, you should still keep your router find with a strong password and keep its firmware updated.
Why do I have multiple IP addresses listed?
You likely have multiple network adapters — one for Wi-Fi, one for ethernet, and possibly virtual ones for other purposes. Use the address from whichever adapter you're actually using to connect. If you're on Wi-Fi, use the Wi-Fi adapter's address. If you're plugged in, use the ethernet address.
Do I need to write down my IP address?
You don't need to memorize it, but it's helpful to know how to find it quickly. You'll usually only need it when setting up a new device, troubleshooting a connection, or accessing your router. You can always look it up again using the same steps.
What if my IP address keeps changing?
This is normal behavior from DHCP. If you need a device to keep the same address, set a static IP in your router settings. Most routers let you reserve an address for a specific device so it always gets the same number, even after restarts.