What this means
The IEEE assigned the MA-M block 646266B to Signal Hound. 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 64:62:66:B, it is Signal Hound hardware.
Frequently Asked Questions
Who owns MAC prefix 646266B?
646266B is registered to Signal Hound in the IEEE MA-M registry.
What does the MA-M registry type mean?
An MA-M assignment covers 28 bits of the address, giving the vendor 1,048,576 device addresses, a quarter of a full MA-L block. Signal Hound's block covers 1,048,576 addresses.
What devices use 646266B?
Any network device with a MAC address starting 64:62:66:B was manufactured by or for Signal Hound.