Who owns MAC prefix 00077F?

00077F is registered to J Communications Co., Ltd. in the IEEE MA-L registry.

What devices use 00077F?

Any network device with a MAC address starting 00:07:7F was manufactured by or for J Communications Co., Ltd..

MA-L · OUI prefix

J Communications Co., Ltd.

Any MAC address starting 00:07:7F is registered to J Communications Co., Ltd. in KR.

OUI prefix	00077F
Vendor	J Communications Co., Ltd.
Registry	MA-L (24-bit, large block)
Country	KR
Example MAC	00:07:7F:00:00:00

What this means

The IEEE assigned the MA-L block 00077F to J Communications Co., Ltd.. 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 00:07:7F, it is J Communications Co., Ltd. hardware.

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