Who owns MAC prefix 74A2351?

74A2351 is registered to Efference in the IEEE MA-M registry.

What devices use 74A2351?

Any network device with a MAC address starting 74:A2:35:1 was manufactured by or for Efference.

MA-M · OUI prefix

Efference

Any MAC address starting 74:A2:35:1 is registered to Efference in US.

OUI prefix	74A2351
Vendor	Efference
Registry	MA-M (28-bit, medium block)
Country	US
Example MAC	74:A2:35:1:00:00:00

What this means

The IEEE assigned the MA-M block 74A2351 to Efference. 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 74:A2:35:1, it is Efference hardware.

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