Who owns MAC prefix 70B3D5503?

70B3D5503 is registered to Itest communication Tech Co., LTD in the IEEE MA-S registry.

What devices use 70B3D5503?

Any network device with a MAC address starting 70:B3:D5:50:3 was manufactured by or for Itest communication Tech Co., LTD.

MA-S · OUI prefix

Itest communication Tech Co., LTD

Any MAC address starting 70:B3:D5:50:3 is registered to Itest communication Tech Co., LTD in CN.

OUI prefix	70B3D5503
Vendor	Itest communication Tech Co., LTD
Registry	MA-S (36-bit, small block)
Country	CN
Example MAC	70:B3:D5:50:3:00:00:00

What this means

The IEEE assigned the MA-S block 70B3D5503 to Itest communication Tech 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:D5:50:3, it is Itest communication Tech Co., LTD hardware.

Look up another MAC