Your MAC address stays the same unless you change your network hardware or settings

A MAC address (Media Access Control address) is a unique identifier assigned to your device's network card — the hardware that connects your computer, phone, or tablet to Wi-Fi or ethernet. It looks like six pairs of numbers and letters, such as 00:1A:2B:3C:4D:5E. Your device's MAC address does not change on its own. It remains the same every time you connect to any network, whether that is your home Wi-Fi, a coffee shop, or a hotel.

The only way your MAC address changes is if you physically replace the network card, install new network hardware, or deliberately change the setting in your device's software. For most people, this never happens. Your MAC address is permanent to that specific device.

Key Takeaways

  • Your MAC address is tied to your device's network hardware and does not change when you move between networks or locations.
  • Replacing your network card, adding a new Wi-Fi adapter, or upgrading your device will give you a different MAC address.
  • Some devices allow you to spoof or change your MAC address through software settings, though this is uncommon on consumer devices.
  • Your router can see your device's MAC address, but websites and internet services cannot — your IP address is what identifies you online.

When your MAC address stays the same

Your MAC address remains unchanged when you switch between networks. If you take your laptop from home to a coffee shop, your MAC address is identical in both places. The coffee shop's Wi-Fi network will see the same MAC address your home router sees. This is by design — the MAC address is a hardware identifier, not a location-based one.

Your MAC address also does not change when you restart your device, update your operating system, or change your Wi-Fi password. These actions do not touch the network hardware itself. Even if you factory reset your phone or computer, the MAC address remains the same because it is burned into the network card during manufacturing.

When your MAC address actually changes

Your MAC address changes only when the network hardware changes. If your laptop's Wi-Fi card fails and you replace it, the new card has a different MAC address. If you add an external USB Wi-Fi adapter to a desktop computer, that adapter has its own MAC address separate from any built-in network card. If you buy a new device, it has a new MAC address.

Some newer devices — particularly iPhones and Android phones — can generate a temporary or randomized MAC address when connecting to unfamiliar networks. Apple calls this private Wi-Fi address, and Google calls it MAC randomization. This feature is designed to protect your privacy by making it harder for networks to track your device across locations. The randomized address changes each time you connect to a new network, but your real MAC address underneath remains the same.

How to find your MAC address

On Windows, open Command Prompt and type ipconfig /all. Look for "Physical Address" in the output — that is your MAC address.

On Mac, go to System Settings, click Network, select your active connection, and click Details. Your MAC address appears as "Wi-Fi Address."

On iPhone, go to Settings, tap General, then About. Scroll down to find "Wi-Fi Address."

On Android, go to Settings, tap About Phone, then Status. Look for "Wi-Fi MAC Address."

Why your router cares about MAC addresses

Your home router uses MAC addresses to manage which devices are connected to it. This is why you can set up a guest network and limit which devices can join — the router recognizes devices by their MAC address. Some routers also allow you to reserve a specific local IP address for a device based on its MAC address, so your printer always gets the same address on your home network.

Routers can also block or allow devices based on MAC address filtering, though this is less common now. If you have ever seen an option to "whitelist" or "blacklist" devices on your router settings, that is MAC address filtering at work.

Why websites and services cannot see your MAC address

Websites, apps, and internet services do not know your MAC address. They see your IP address instead, which is assigned by your internet service provider or your router. Your MAC address only travels as far as your local network — it is used to route data between your device and your router, but it does not leave your home network to reach the wider internet.

This is an important distinction for privacy. Your MAC address is visible to devices on your local network (your router, other computers on your Wi-Fi, devices on your ethernet cable). Your IP address is visible to every website you visit and every service you use. If you are concerned about online tracking, changing your MAC address will not help — websites track you through your IP address, cookies, and account information, not your MAC address.

Manually changing your MAC address

Some operating systems allow you to change your MAC address through software, a process called MAC spoofing. On Windows, this is usually done through advanced network adapter settings or third-party software. On Mac and Linux, you can use terminal commands to change it temporarily (the change reverts when you restart). On iPhones and most Android phones, you cannot manually change your MAC address — the operating system does not expose this setting.

For most home users, there is no reason to change your MAC address. It is useful mainly for network troubleshooting or in specialized situations like testing network security. If you are trying to hide your identity online, changing your MAC address will not accomplish that — you would need to change your IP address instead, which requires a different approach.

Frequently Asked Questions

Does my MAC address change when I connect to a different Wi-Fi network?

No. Your MAC address stays the same no matter which network you connect to. However, newer phones may use a randomized MAC address for privacy, which changes per network, while your real MAC address underneath remains constant.

Will restarting my device change my MAC address?

No. Restarting does not affect your MAC address. It is stored on your network hardware and persists through restarts, updates, and factory resets.

Can I change my MAC address to hide from my internet service provider?

No. Your ISP sees your IP address, not your MAC address. Changing your MAC address only affects devices on your local network. To change what your ISP sees, you would need to contact them about changing your IP address, which they may or may not allow.

Why does my phone show a different Wi-Fi address than my computer?

Each device has its own unique MAC address. Your phone's Wi-Fi address is different from your computer's because they have different network hardware. If your phone uses private Wi-Fi address or MAC randomization, it may show a randomized address instead of the real one.

If I replace my Wi-Fi router, will my devices' MAC addresses change?

No. Your devices' MAC addresses are tied to their network hardware, not your router. A new router will see the same MAC addresses from your devices that your old router did.