What this means
The IEEE assigned the MA-S block 70B3D59BD to Signal Processing Devices Sweden AB. 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 70:B3:D5:9B:D, it is Signal Processing Devices Sweden AB hardware.
Frequently Asked Questions
Who owns MAC prefix 70B3D59BD?
70B3D59BD is registered to Signal Processing Devices Sweden AB in the IEEE MA-S registry.
What does the MA-S registry type mean?
An MA-S assignment, formerly called OUI-36, covers 36 bits, giving the vendor 4,096 device addresses, the smallest block the IEEE issues. Signal Processing Devices Sweden AB's block covers 4,096 addresses.
What devices use 70B3D59BD?
Any network device with a MAC address starting 70:B3:D5:9B:D was manufactured by or for Signal Processing Devices Sweden AB.