What a Mac address is and why you might need it

A Mac address (Media Access Control address) is a unique identifier assigned to the network card in your computer. It looks like this: 00:1A:2B:3C:4D:5E — six pairs of numbers and letters separated by colons. Every device that connects to the internet has one, and no two devices on the same network should have the same Mac address.

You might need to find your Mac address if your internet provider asks for it, if you are setting up a new router, or if your network administrator needs to register your device. Some networks only allow devices with approved Mac addresses to connect. Unlike your IP address, which can change, your Mac address stays the same as long as you keep the same network card.

Key Takeaways

  • Your Mac address is a unique identifier for your network card, shown as six pairs of numbers and letters like 00:1A:2B:3C:4D:5E.
  • The fastest way to find it is to open Command Prompt and type ipconfig /all, then look for "Physical Address" in the results.
  • If you have multiple network cards (Wi-Fi and Ethernet), you will see multiple Mac addresses — one for each card.
  • You can also find your Mac address in Settings under Network & Internet, though the Command Prompt method is faster and more reliable.

Finding your Mac address using Command Prompt

Open Command Prompt by pressing the Windows key, typing cmd, and pressing Enter. You can also right-click the Start menu and select "Windows Terminal" or "Command Prompt" if you see it there.

Type this command exactly: ipconfig /all and press Enter. A list of information will appear. Look for the section labeled with your network connection name — usually "Ethernet" if you are plugged in with a cable, or "Wireless LAN adapter Wi-Fi" if you are using Wi-Fi. Under that section, find the line that says "Physical Address". The string of numbers and letters next to it is your Mac address. Copy it carefully, including all the colons.

If you see multiple sections with different network adapters, each one will have its own Mac address. Write down the one that matches the connection you are actually using.

Finding your Mac address in Windows Settings

Click the Start menu and open Settings. Go to Network & Internet, then select the type of connection you are using — either Wi-Fi or Ethernet.

If you chose Wi-Fi, click on your network name. Scroll down until you see "Properties". Look for "Physical address (MAC)" in the list. If you chose Ethernet, click "Ethernet" in the left sidebar, then scroll down to find "Physical address (MAC)".

This method works, but the information can sometimes be harder to find depending on your Windows version. Command Prompt is usually faster if you are comfortable typing a single line.

What to do if you have multiple Mac addresses

Most computers have at least two network cards: one for Wi-Fi and one for Ethernet (the wired connection). Each card has its own Mac address. If you ran ipconfig /all and saw multiple "Physical Address" entries, that is normal.

Use the Mac address that matches the connection you actually use. If your computer is plugged in with an Ethernet cable, use the Ethernet Mac address. If you connect wirelessly, use the Wi-Fi Mac address. If you are not sure which one you use, check your network icon in the bottom right corner of your screen — it will show you whether you are connected via Wi-Fi or Ethernet.

Copying and sharing your Mac address safely

Once you have found your Mac address, you can copy it and paste it into an email or form. There is no security risk in sharing your Mac address — it is not a password, and knowing it does not let someone access your computer or your network.

However, make sure you are giving it to someone you trust or to an official source like your internet provider or your workplace IT department. If someone asks for your Mac address over the phone or in an unexpected email, it is reasonable to ask why they need it before you share it.

Frequently Asked Questions

Can I change my Mac address?

Yes, but it is not common. You can change it through advanced network settings or with third-party software, but most people never need to. If someone told you to change your Mac address to fix a problem, double-check that information — it is rarely the solution.

Is my Mac address the same as my IP address?

No. Your IP address is assigned by your internet provider and can change. Your Mac address is built into your network card and stays the same. They serve different purposes on your network.

What if the Command Prompt method does not show my network?

Make sure you are connected to the network first — either plugged in with Ethernet or connected to Wi-Fi. If you are connected and still do not see it, try typing getmac instead of ipconfig /all. This shows all Mac addresses on your computer in a simpler format.

Do I need my Mac address to connect to Wi-Fi?

Not usually. Most Wi-Fi networks just need your password. You only need to provide your Mac address if the network owner has set up filtering to allow only certain devices, or if your internet provider asks for it during setup.