What this means
The IEEE assigned the MA-S block 70B3D5016 to Guardian Controls International Ltd. 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:D5:01:6, it is Guardian Controls International Ltd hardware.
Frequently Asked Questions
Who owns MAC prefix 70B3D5016?
70B3D5016 is registered to Guardian Controls International Ltd 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. Guardian Controls International Ltd's block covers 4,096 addresses.
What devices use 70B3D5016?
Any network device with a MAC address starting 70:B3:D5:01:6 was manufactured by or for Guardian Controls International Ltd.