What a Mac address is and why you need it

A Mac address (Media Access Control address) is a unique identifier assigned to every device that connects to a network — your laptop, phone, printer, smart TV, anything with WiFi or ethernet. It looks like a string of letters and numbers separated by colons, such as 00:1A:2B:3C:4D:5E. Unlike your IP address, which can change, your Mac address stays the same for that specific device.

You need your Mac address when you're setting up a new network, troubleshooting connection problems, or when someone asks you to add your device to a restricted WiFi network. Some routers only let devices with approved Mac addresses connect — this is called MAC filtering. Your internet service provider might also ask for it when you're having connection issues.

The steps to find it differ depending on whether you're using Windows, Mac, iPhone, Android, or another device. The process takes less than a minute once you know where to look.

Key Takeaways

  • Your Mac address is a unique identifier for your device's network connection and looks like six pairs of letters and numbers separated by colons.
  • On Windows, you can find it by opening Command Prompt and typing ipconfig /all, then looking for "Physical Address".
  • On Mac computers, go to System Preferences > Network, select your connection, and click Advanced to see the Mac address listed as "Wi-Fi Address".
  • On iPhones and iPads, go to Settings > General > About and scroll to find "Wi-Fi Address".
  • On Android phones, go to Settings > About Phone > Status or Device Info and look for "Wi-Fi Mac Address" or "Mac Address".

Finding your Mac address on Windows

Open Command Prompt by pressing the Windows key and typing cmd, then press Enter. A black window will open with a blinking cursor. Type ipconfig /all and press Enter. The window will display a lot of information about your network connections.

Look for the section labeled with your connection type — either "Ethernet adapter" if you're plugged in with a cable, or "Wireless LAN adapter" if you're on WiFi. Within that section, find the line that says "Physical Address". The string of letters and numbers next to it is your Mac address. It will look something like A4:34:D9:12:F5:8C. You can right-click and select "Copy" to copy it, or write it down.

If you have multiple network adapters listed, make sure you're looking at the one you actually use. If you're on WiFi, use the wireless adapter. If you're plugged in with ethernet, use the ethernet adapter.

Finding your Mac address on a Mac computer

Click the Apple menu in the top-left corner and select "System Preferences" (or "System Settings" on newer versions). Click "Network". On the left side, select the connection you want — either "Wi-Fi" if you're wireless, or "Ethernet" if you're plugged in with a cable.

Click the "Advanced" button in the bottom-right corner. A new window will open. Click the "Wi-Fi" tab (or "Ethernet" tab if you selected ethernet). Near the top, you'll see "Wi-Fi Address" (or "Ethernet Address"). The string next to it is your Mac address.

If you don't see an Advanced button, your Mac address may be displayed directly on the Network screen. Look for a line labeled "Wi-Fi Address" or "Ethernet Address" on the main connection details.

Finding your Mac address on iPhone or iPad

Open the Settings app. Tap "General", then scroll down and tap "About". Scroll through the list until you find "Wi-Fi Address". The string of letters and numbers next to it is your Mac address. You can tap and hold it to copy it to your clipboard.

This is the address for your device's WiFi connection. If you need the Bluetooth Mac address instead, it's listed separately as "Bluetooth Address" on the same screen.

Finding your Mac address on Android

Open Settings. Tap "About Phone" or "About Device" (the exact name varies by manufacturer). Look for a section called "Status" or "Device Info". Scroll through until you find "Wi-Fi Mac Address" or just "Mac Address". The string next to it is what you need.

On some Android phones, the Mac address is under Settings > System > About Phone > Status. On Samsung devices, it's sometimes under Settings > About Phone > Status. If you can't find it in one location, try the other. The location depends on your phone's manufacturer and Android version.

Finding your Mac address on a printer or other device

For printers, routers, and other networked devices, check the device's settings menu or control panel. Many printers have a small screen where you can navigate to Network Settings or Device Info to see the Mac address. Some devices print a configuration page that includes the Mac address — check your device's manual for how to print this page.

If the device doesn't have a screen, you can often find the Mac address by logging into your router's admin panel and looking at the list of connected devices. Your router displays the Mac address of every device currently connected to it. To access your router, open a web browser and type your router's IP address (usually 192.168.1.1 or 192.168.0.1) into the address bar, then log in with your router's username and password.

What to do once you have your Mac address

Once you've found your Mac address, write it down or save it somewhere you can find it later. If someone asks you to add your device to a network's approved list, give them the exact string — make sure you copy it correctly, because even one wrong character will prevent your device from connecting.

If you're setting up MAC filtering on your own router, log into your router's admin panel, find the MAC filtering or access control settings, and add the Mac addresses of the devices you want to allow. The exact steps vary by router model, so check your router's manual or the manufacturer's website for instructions specific to your device.

Frequently Asked Questions

Can I change my Mac address?

Technically yes, but it's not something you should do unless you have a specific reason. Most devices let you change the Mac address through advanced network settings, but changing it can break network connections or cause other devices to stop recognizing you. If you think you need to change it, contact the person who manages your network first.

Why does my Mac address look different each time I check?

Some newer devices use "private" or "randomized" Mac addresses for WiFi connections to protect your privacy. This means the address changes each time you connect to a new network. If you need a permanent Mac address for network setup, look for a setting called "Private Address" or "MAC Randomization" and turn it off, or ask your network administrator how to handle this.

Is my Mac address the same as my IP address?

No. Your Mac address is a permanent identifier for your specific device's network hardware. Your IP address is assigned by your network or internet provider and can change. Think of the Mac address as your device's serial number and the IP address as your current location on the network.

Do I need to give my Mac address to my internet provider?

Only if they ask for it. Some providers need it when you're setting up a modem or troubleshooting connection problems. If they request it, they'll tell you specifically what they need it for.