Who owns MAC prefix 40F21C?

40F21C is registered to Zhone Technologies, Inc. in the IEEE MA-L registry.

What devices use 40F21C?

Any network device with a MAC address starting 40:F2:1C was manufactured by or for Zhone Technologies, Inc..

MA-L · OUI prefix

Zhone Technologies, Inc.

Any MAC address starting 40:F2:1C is registered to Zhone Technologies, Inc. in US.

OUI prefix	40F21C
Vendor	Zhone Technologies, Inc.
Registry	MA-L (24-bit, large block)
Country	US
Example MAC	40:F2:1C:00:00:00

What this means

The IEEE assigned the MA-L block 40F21C to Zhone Technologies, 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 40:F2:1C, it is Zhone Technologies, Inc. hardware.

Other Zhone Technologies, Inc. prefixes

Zhone Technologies, Inc. holds 12 registered blocks in total.

000147 000271 00180C 003052 0050CA 00A01B 00E0DF 304F75 9C65EE CC6C52 D096FB

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