Who owns MAC prefix 18EFC0?

18EFC0 is registered to Sercomm Japan Corporation in the IEEE MA-L registry.

What devices use 18EFC0?

Any network device with a MAC address starting 18:EF:C0 was manufactured by or for Sercomm Japan Corporation.

MA-L · OUI prefix

Sercomm Japan Corporation

Any MAC address starting 18:EF:C0 is registered to Sercomm Japan Corporation in TW.

OUI prefix	18EFC0
Vendor	Sercomm Japan Corporation
Registry	MA-L (24-bit, large block)
Country	TW
Example MAC	18:EF:C0:00:00:00

What this means

The IEEE assigned the MA-L block 18EFC0 to Sercomm Japan 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 18:EF:C0, it is Sercomm Japan Corporation hardware.

Other Sercomm Japan Corporation prefixes

Sercomm Japan Corporation holds 4 registered blocks in total.

04585D5 4CFBFE 7425849

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