MACMask enables you to change or mask the MAC Address of a network adapter for Windows NT, 2000, XP, and Server 2003 systems. It enumerates the LAN and list all MAC addresses. You can then change any of them to a new one, and even include a real vendor name. The changes will take effect immediately after you apply the new MAC address, no additional adapter configurations are needed. MACMask does not change the hardware built-in MAC-address, but the software based MAC Address, and changes can be easily undone and your original MAC address restored. It is useful for network testing and troubleshooting, as well as security testing.

The license of this software is Free Trial Software, the price is $15.00, you can free download and get a free trial.