Who owns MAC prefix A4EF52?

A4EF52 is registered to Telewave Co., Ltd. in the IEEE MA-L registry.

What devices use A4EF52?

Any network device with a MAC address starting A4:EF:52 was manufactured by or for Telewave Co., Ltd..

MA-L · OUI prefix

Telewave Co., Ltd.

Any MAC address starting A4:EF:52 is registered to Telewave Co., Ltd. in KR.

OUI prefix	A4EF52
Vendor	Telewave Co., Ltd.
Registry	MA-L (24-bit, large block)
Country	KR
Example MAC	A4:EF:52:00:00:00

What this means

The IEEE assigned the MA-L block A4EF52 to Telewave 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 A4:EF:52, it is Telewave Co., Ltd. hardware.

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