What this means
The IEEE assigned the MA-S block 70B3D5BDE to CAST Group of Companies Inc.. 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:BD:E, it is CAST Group of Companies Inc. hardware.
Frequently Asked Questions
Who owns MAC prefix 70B3D5BDE?
70B3D5BDE is registered to CAST Group of Companies Inc. 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. CAST Group of Companies Inc.'s block covers 4,096 addresses.
What devices use 70B3D5BDE?
Any network device with a MAC address starting 70:B3:D5:BD:E was manufactured by or for CAST Group of Companies Inc..