What a MAC address is and why you need it

A MAC address (Media Access Control address) is a unique identifier assigned to your computer's network card. It looks like a string of six pairs of numbers and letters, separated by colons or hyphens — for example, 00:1A:2B:3C:4D:5E. Every device that connects to a network has one, and no two are identical.

You need your MAC address when your router requires you to register devices before they can connect, when you are setting up a network printer, or when your internet service provider asks for it during troubleshooting. Some workplaces and schools also use MAC addresses to control which devices can access their networks.

The process of finding it takes less than a minute and requires no special software — Windows stores this information where you can see it directly.

Key Takeaways

  • Your MAC address is a unique identifier for your network card and appears in your network settings or command prompt output.
  • The quickest method is to open Command Prompt, type ipconfig /all, and look for the line labeled "Physical Address."
  • You can also find it in Windows Settings under Network & Internet by viewing your network adapter details.
  • If you have multiple network adapters (Ethernet and Wi-Fi), each one has its own MAC address — find the one for the connection you actually use.

Finding your MAC address using Command Prompt

This is the fastest method. Press the Windows key, type cmd, and open Command Prompt. Type the following command exactly as shown and press Enter:

ipconfig /all

A list of network information will appear. Look for the section labeled with your connection type — either "Ethernet adapter" if you use a wired connection, or "Wireless LAN adapter" if you use Wi-Fi. Within that section, find the line that says "Physical Address." The string of characters next to it is your MAC address. Copy it exactly as it appears, including the hyphens.

If you have both Ethernet and Wi-Fi adapters, you will see both listed. Make sure you copy the address from the adapter you actually use to connect to the network.

Finding your MAC address in Windows Settings

Open Windows Settings by pressing the Windows key and typing Settings. Select "Network & Internet" from the left menu, then choose either "Ethernet" or "Wi-Fi" depending on how you connect.

If you use Ethernet, click on your connected network. If you use Wi-Fi, click on the network you are currently connected to. Scroll down and select "View additional properties." Look for the field labeled "Physical address (MAC)" — that is your MAC address.

This method works the same way in Windows 10 and Windows 11, though the exact menu names may vary slightly between versions.

Finding your MAC address on your network adapter itself

If your computer is not turning on or you cannot access Windows, you can sometimes find the MAC address printed on a label attached to your network card. Open your computer case (or laptop if it is designed to open) and locate the network adapter — it is usually a small card plugged into the motherboard with a port for an Ethernet cable or antenna connectors for Wi-Fi.

The label may show the MAC address directly, or it may show a barcode that contains it. This method is less common because most people can access their MAC address through Windows, but it is useful if your system will not boot.

If you are uncomfortable opening your computer, skip this step and use one of the software methods above instead.

What to do once you have your MAC address

Once you have copied your MAC address, store it somewhere you can find it again — a note in your phone, an email to yourself, or a document on your computer. If your router or network administrator asks for it, paste it exactly as it appears, with no extra spaces or changes to the format.

Some devices and networks are picky about whether the MAC address is formatted with colons or hyphens. If the first format does not work, try replacing the colons with hyphens or removing them entirely, and ask the person or system that requested it which format they need.

Troubleshooting if you cannot find your MAC address

If the Command Prompt method shows no results, your network adapter may not be installed or may have a driver problem. Check Device Manager by pressing the Windows key, typing Device Manager, and opening it. Look for "Network adapters" in the list. If you see a device with a yellow warning icon, right-click it and select "Update driver."

If you see no network adapters listed at all, your adapter may have failed or been disabled. Restart your computer first — this fixes many temporary connection problems. If the adapter still does not appear, you may need to replace the network card or contact a technician.

If you are using a laptop and cannot find a Wi-Fi adapter, check whether airplane mode is turned on. Press the Windows key and type "airplane mode" to open the setting, and make sure it is off.

Frequently Asked Questions

Can someone use my MAC address to hack my computer?

A MAC address alone is not enough to hack your computer — it only identifies your device on a local network. However, someone on the same network could use it to impersonate your device or block you from connecting. Keep your MAC address private in the same way you would keep your home address private, but do not panic if someone sees it.

Why do I have more than one MAC address?

If you have both an Ethernet port and Wi-Fi, each one has its own MAC address because each is a separate network adapter. Some computers also have Bluetooth adapters with their own addresses. You only need the address for the connection type you actually use.

Will my MAC address change if I restart my computer?

No. Your MAC address is permanently assigned to your network card and stays the same unless you replace the card or change its driver settings. Restarting your computer does not affect it.

What is the difference between a MAC address and an IP address?

A MAC address identifies your device on a local network (like your home Wi-Fi), while an IP address identifies it on the internet. Your MAC address never changes; your IP address can change when you reconnect to the network or move to a different network.