What this means
The IEEE assigned the MA-S block 70B3D5740 to Prisma Telecom Testing Srl. 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:D5:74:0, it is Prisma Telecom Testing Srl hardware.
Frequently Asked Questions
Who owns MAC prefix 70B3D5740?
70B3D5740 is registered to Prisma Telecom Testing Srl 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. Prisma Telecom Testing Srl's block covers 4,096 addresses.
What devices use 70B3D5740?
Any network device with a MAC address starting 70:B3:D5:74:0 was manufactured by or for Prisma Telecom Testing Srl.