What this means
The IEEE assigned the MA-S block 70B3D51C3 to Shanghai Tiancheng Communication Technology Corporation. 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:D5:1C:3, it is Shanghai Tiancheng Communication Technology Corporation hardware.
Frequently Asked Questions
Who owns MAC prefix 70B3D51C3?
70B3D51C3 is registered to Shanghai Tiancheng Communication Technology Corporation 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. Shanghai Tiancheng Communication Technology Corporation's block covers 4,096 addresses.
What devices use 70B3D51C3?
Any network device with a MAC address starting 70:B3:D5:1C:3 was manufactured by or for Shanghai Tiancheng Communication Technology Corporation.