Who owns MAC prefix 70B3D57B8?

70B3D57B8 is registered to SerEnergy A/S in the IEEE MA-S registry.

What devices use 70B3D57B8?

Any network device with a MAC address starting 70:B3:D5:7B:8 was manufactured by or for SerEnergy A/S.

MA-S · OUI prefix

SerEnergy A/S

Any MAC address starting 70:B3:D5:7B:8 is registered to SerEnergy A/S in DK.

OUI prefix	70B3D57B8
Vendor	SerEnergy A/S
Registry	MA-S (36-bit, small block)
Country	DK
Example MAC	70:B3:D5:7B:8:00:00:00

What this means

The IEEE assigned the MA-S block 70B3D57B8 to SerEnergy A/S. 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:D5:7B:8, it is SerEnergy A/S hardware.

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