Who owns MAC prefix 78D9E9?

78D9E9 is registered to MOMENTUM IOT in the IEEE MA-L registry.

What devices use 78D9E9?

Any network device with a MAC address starting 78:D9:E9 was manufactured by or for MOMENTUM IOT.

MA-L · OUI prefix

MOMENTUM IOT

Any MAC address starting 78:D9:E9 is registered to MOMENTUM IOT in US.

OUI prefix	78D9E9
Vendor	MOMENTUM IOT
Registry	MA-L (24-bit, large block)
Country	US
Example MAC	78:D9:E9:00:00:00

What this means

The IEEE assigned the MA-L block 78D9E9 to MOMENTUM IOT. 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 78:D9:E9, it is MOMENTUM IOT hardware.

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