What a Mac Address Is and Why You Need It

A MAC address (Media Access Control address) is a unique identifier assigned to your network card — the hardware that connects your computer to the internet or a local network. It looks like six pairs of numbers and letters, such as 00:1A:2B:3C:4D:5E. Unlike your IP address, which can change, your MAC address stays the same as long as you keep the same network card.

You need your MAC address when you set up a new router, register a device on a network that tracks hardware, troubleshoot connection problems, or configure your network to allow only certain devices. Some workplaces and schools require you to register your computer's MAC address before it can connect to their Wi-Fi.

Windows stores this information in your network settings, and you can find it in under a minute using one of three methods — the quickest works from the command line, while the others use the graphical settings menu.

Key Takeaways

  • Your MAC address is a unique identifier for your network card and appears as six pairs of numbers and letters separated by colons or hyphens.
  • The fastest way to find it is to open Command Prompt and type ipconfig /all, then look for "Physical Address" next to your active network connection.
  • You can also find it in Settings by going to Network & Internet, selecting your connection type, and scrolling to "Physical Address" under the connection details.
  • If you have multiple network cards (Wi-Fi and Ethernet), you will see a separate MAC address for each one.

Finding Your Mac Address Using Command Prompt

Open Command Prompt by pressing Windows key + R, typing cmd, and pressing Enter. At the prompt, type ipconfig /all and press Enter. Windows will display information about every network connection on your computer.

Look for the section labeled with your connection type — either "Ethernet adapter" if you are plugged in with a cable, or "Wireless LAN adapter" if you are on Wi-Fi. Under that section, find the line that says "Physical Address". The value next to it is your MAC address. It will look like 00-1A-2B-3C-4D-5E (with hyphens instead of colons, but it is the same thing).

If you have both Wi-Fi and Ethernet connected, you will see both adapters listed separately, each with its own MAC address. Use the one that matches the connection you are actually using.

Finding Your Mac Address in Windows Settings

Open Settings by pressing Windows key + I. Click Network & Internet in the left sidebar. On the right side, you will see your current connection listed — either "Wi-Fi" or "Ethernet" depending on how you are connected.

Click on your connection name. Scroll down to the bottom of the page and look for "Physical Address" under the connection details. This is your MAC address. If you want to check the MAC address for a different connection (for example, if you are on Wi-Fi but want to see your Ethernet address), go back to the Network & Internet page and click on the other connection type instead.

Finding Your Mac Address on a Specific Network Adapter

If you have multiple network cards and need to see all of them at once, you can use the Device Manager. Press Windows key + X and select Device Manager. Click the arrow next to "Network adapters" to expand the list.

Right-click on the adapter you want to check and select Properties. Click the Advanced tab. Scroll through the list on the left until you find "Network Address" or "Locally Administered Address". The value shown on the right is your MAC address for that specific adapter. If you do not see it listed, use the Command Prompt method instead — it is more reliable for viewing all adapters at once.

What to Do With Your Mac Address Once You Have It

Once you have found your MAC address, write it down or take a screenshot — you will need it when you register your device on a network. When a network administrator or router setup page asks for your MAC address, paste or type the exact string of numbers and letters, including the hyphens or colons if they are shown.

Some routers and networks accept the address with hyphens, others with colons, and some accept either format. If one format does not work, try replacing the hyphens with colons or vice versa. The address itself does not change — only the way it is written.

Troubleshooting If You Cannot Find Your Mac Address

If the Command Prompt method shows no adapters or the Settings page does not display a Physical Address, your network card may not be installed correctly or may be disabled. Press Windows key + X and open Device Manager. Look for "Network adapters" and expand it. If you see a device with a yellow warning triangle or an X, right-click it and select Enable device.

If the adapter is not listed at all, you may need to install drivers from the manufacturer's website. Check your computer's model number (usually on a sticker on the bottom or back) and visit the manufacturer's support page to download the latest network drivers. After installing them, restart your computer and try the Command Prompt method again.

Frequently Asked Questions

Can I change my Mac address in Windows?

Some network cards allow you to change the MAC address through Device Manager or third-party software, but most home users should not do this. Changing it can break your network connection or violate your network's rules. If a network requires a specific MAC address, contact the administrator instead of trying to change yours.

Why do I see different Mac addresses for Wi-Fi and Ethernet?

Each network card — whether it is built into your motherboard or added separately — has its own unique MAC address. If your computer has both Wi-Fi and Ethernet, each one is a separate piece of hardware with a separate address. Use the one that matches the connection you are actually using.

Is my Mac address the same as my IP address?

No. Your MAC address is permanent and identifies your network card. Your IP address is assigned by your router or network and can change. A MAC address works only on your local network, while an IP address works across the internet.

Do I need to hide my Mac address for privacy?

Your MAC address is only visible to devices on your local network, not to websites you visit or the broader internet. You do not need to hide it for privacy. However, some networks use MAC filtering to control which devices can connect, so keep your address private from people outside your household or workplace.