What this means
The IEEE assigned the MA-S block 70B3D56C3 to BEIJING ZGH SECURITY RESEARCH INSTITUTE 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:D5:6C:3, it is BEIJING ZGH SECURITY RESEARCH INSTITUTE CO., LTD hardware.
Frequently Asked Questions
Who owns MAC prefix 70B3D56C3?
70B3D56C3 is registered to BEIJING ZGH SECURITY RESEARCH INSTITUTE 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. BEIJING ZGH SECURITY RESEARCH INSTITUTE CO., LTD's block covers 4,096 addresses.
What devices use 70B3D56C3?
Any network device with a MAC address starting 70:B3:D5:6C:3 was manufactured by or for BEIJING ZGH SECURITY RESEARCH INSTITUTE CO., LTD.