What this means
The IEEE assigned the MA-S block 70B3D564F to GUNMA ELECTRONICS CO 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:D5:64:F, it is GUNMA ELECTRONICS CO LTD hardware.
Frequently Asked Questions
Who owns MAC prefix 70B3D564F?
70B3D564F is registered to GUNMA ELECTRONICS CO 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. GUNMA ELECTRONICS CO LTD's block covers 4,096 addresses.
What devices use 70B3D564F?
Any network device with a MAC address starting 70:B3:D5:64:F was manufactured by or for GUNMA ELECTRONICS CO LTD.