Who owns MAC prefix 4CEFC0?

4CEFC0 is registered to Amazon Technologies Inc. in the IEEE MA-L registry.

What devices use 4CEFC0?

Any network device with a MAC address starting 4C:EF:C0 was manufactured by or for Amazon Technologies Inc..

MA-L · OUI prefix

Amazon Technologies Inc.

Any MAC address starting 4C:EF:C0 is registered to Amazon Technologies Inc. in US.

OUI prefix	4CEFC0
Vendor	Amazon Technologies Inc.
Registry	MA-L (24-bit, large block)
Country	US
Example MAC	4C:EF:C0:00:00:00

What this means

The IEEE assigned the MA-L block 4CEFC0 to Amazon 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 4C:EF:C0, it is Amazon Technologies Inc. hardware.

Other Amazon Technologies Inc. prefixes

Amazon Technologies Inc. holds 204 registered blocks in total.

007147 008621 00BB3A 00F361 00FC8B 0812A5 0857FB 086AE5 087B0F 087C39 08849D 089115 all 204 »

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