Who owns MAC prefix 64E599?

64E599 is registered to EFM Networks in the IEEE MA-L registry.

What devices use 64E599?

Any network device with a MAC address starting 64:E5:99 was manufactured by or for EFM Networks.

MA-L · OUI prefix

EFM Networks

Any MAC address starting 64:E5:99 is registered to EFM Networks in KR.

OUI prefix	64E599
Vendor	EFM Networks
Registry	MA-L (24-bit, large block)
Country	KR
Example MAC	64:E5:99:00:00:00

What this means

The IEEE assigned the MA-L block 64E599 to EFM Networks. 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 64:E5:99, it is EFM Networks hardware.

Other EFM Networks prefixes

EFM Networks holds 8 registered blocks in total.

00089F 002666 588694 705DCC 88366C 909F33 B0386C

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