MAC address change

Change MAC address

　The MAC address is written by the vendor at the time of shipment and is not supposed to be manipulated by the user in principle. Basically, the MAC address is not supposed to be involved on the user side, but it can be changed.

Select your network adapter from Device Manager to view its properties.

* For properties, the number of items that can be set and the display name will change depending on the NIC.

On the Advanced tab there is an item called “Locally Administered Address”.

　In the initial state, it is “does not exist”, but you can specify the MAC address you want to use by setting a value there. When specifying the MAC address specified here, the “:” and “-” used as delimiters are not required.

Here, change the value to “0018F32320B6” and press the “OK” button.

From the command prompt, run the “ipconfig /all” command.

You can confirm that the MAC address has been changed to “0018F32320B6”.

　MAC addresses are supposed to be unique and unique. MAC addresses are not usually duplicated. Duplicate MAC addresses can cause network problems.

　In addition, in managed networks such as companies, MAC addresses may be used for encryption and authentication. Be careful when changing the MAC address.

MAC address change tool

There are the following methods to change the MAC address.

・Method of setting from the device manager ・Method
of directly editing the registry ・Method
of using the MAC address change tool

How to edit the registry

1. Launch a registry modification application such as “regedit”.
2. Open “HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Class\{4D36E972-E325-11CE-BFC1-08002BE10318}”.
3. Search “0000”, “0001”, “0002”, and so on until you find the network adapter you want to change.
4. Change MAC address.

However, this method is risky because it directly edits the registry.

How to use the MAC address change tool

Use a MAC address change tool such as “Technitium MAC Address Changer v5” or “Mac MakeUP”.

*These tools may be detected as viruses by some antivirus software. Using these tools is not recommended. Use is at your own risk.

　In normal network usage, there is no need to change the MAC address. Do not change anything other than verification of MAC address filtering.