Who owns MAC prefix 4C9EFF?

4C9EFF is registered to Zyxel Communications Corporation in the IEEE MA-L registry.

What devices use 4C9EFF?

Any network device with a MAC address starting 4C:9E:FF was manufactured by or for Zyxel Communications Corporation.

MA-L · OUI prefix

Zyxel Communications Corporation

Any MAC address starting 4C:9E:FF is registered to Zyxel Communications Corporation in TW.

OUI prefix	4C9EFF
Vendor	Zyxel Communications Corporation
Registry	MA-L (24-bit, large block)
Country	TW
Example MAC	4C:9E:FF:00:00:00

What this means

The IEEE assigned the MA-L block 4C9EFF to Zyxel Communications Corporation. 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 4C:9E:FF, it is Zyxel Communications Corporation hardware.

Other Zyxel Communications Corporation prefixes

Zyxel Communications Corporation holds 71 registered blocks in total.

001349 0019CB 0023F8 00A0C5 04BF6D 082697 1071B3 107BEF 10C5FA 143375 14360E 14C7C4 all 71 »

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