Who owns MAC prefix B4475E?

B4475E is registered to Avaya Inc in the IEEE MA-L registry.

What devices use B4475E?

Any network device with a MAC address starting B4:47:5E was manufactured by or for Avaya Inc.

MA-L · OUI prefix

Avaya Inc

Any MAC address starting B4:47:5E is registered to Avaya Inc in US.

OUI prefix	B4475E
Vendor	Avaya Inc
Registry	MA-L (24-bit, large block)
Country	US
Example MAC	B4:47:5E:00:00:00

What this means

The IEEE assigned the MA-L block B4475E to Avaya Inc. 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 B4:47:5E, it is Avaya Inc hardware.

Other Avaya Inc prefixes

Avaya Inc holds 52 registered blocks in total.

00040D 001B4F 00549F 048A15 10CDAE 14612F 24B209 24D921 2CF4C5 3475C7 38BB3C 3C3A73 all 52 »

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