What this means
The IEEE assigned the MA-S block 70B3D5FAB to Open System Solutions Limited. 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:FA:B, it is Open System Solutions Limited hardware.
Frequently Asked Questions
Who owns MAC prefix 70B3D5FAB?
70B3D5FAB is registered to Open System Solutions Limited 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. Open System Solutions Limited's block covers 4,096 addresses.
What devices use 70B3D5FAB?
Any network device with a MAC address starting 70:B3:D5:FA:B was manufactured by or for Open System Solutions Limited.