Who owns MAC prefix 3C3A73?

3C3A73 is registered to Avaya Inc in the IEEE MA-L registry.

What devices use 3C3A73?

Any network device with a MAC address starting 3C:3A:73 was manufactured by or for Avaya Inc.

MA-L · OUI prefix

Avaya Inc

Any MAC address starting 3C:3A:73 is registered to Avaya Inc in US.

OUI prefix	3C3A73
Vendor	Avaya Inc
Registry	MA-L (24-bit, large block)
Country	US
Example MAC	3C:3A:73:00:00:00

What this means

The IEEE assigned the MA-L block 3C3A73 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 3C:3A:73, 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 3CB15B all 52 »

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