Who owns MAC prefix 70B3D521E?

70B3D521E is registered to Hildebrand Technology Limited in the IEEE MA-S registry.

What devices use 70B3D521E?

Any network device with a MAC address starting 70:B3:D5:21:E was manufactured by or for Hildebrand Technology Limited.

MA-S · OUI prefix

Hildebrand Technology Limited

Any MAC address starting 70:B3:D5:21:E is registered to Hildebrand Technology Limited.

OUI prefix	70B3D521E
Vendor	Hildebrand Technology Limited
Registry	MA-S (36-bit, small block)
Example MAC	70:B3:D5:21:E:00:00:00

What this means

The IEEE assigned the MA-S block 70B3D521E to Hildebrand Technology Limited. 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:D5:21:E, it is Hildebrand Technology Limited hardware.

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