What this means
The IEEE assigned the MA-L block 28656B to Keystone Microtech Corporation. Every network interface they manufacture under this block has a MAC address beginning with these digits, followed by a unique per-device identifier. If a device on your network shows a MAC starting 28:65:6B, it is Keystone Microtech Corporation hardware.
Frequently Asked Questions
Who owns MAC prefix 28656B?
28656B is registered to Keystone Microtech Corporation in the IEEE MA-L registry.
What does the MA-L registry type mean?
An MA-L assignment, the IEEE's original OUI format, gives the vendor the first three octets and 16,777,216 device addresses under them. Keystone Microtech Corporation's block covers 16,777,216 addresses.
What devices use 28656B?
Any network device with a MAC address starting 28:65:6B was manufactured by or for Keystone Microtech Corporation.