Who owns MAC prefix EC42B4?

EC42B4 is registered to ADC Corporation in the IEEE MA-L registry.

What devices use EC42B4?

Any network device with a MAC address starting EC:42:B4 was manufactured by or for ADC Corporation.

MA-L · OUI prefix

ADC Corporation

Any MAC address starting EC:42:B4 is registered to ADC Corporation in JP.

OUI prefix	EC42B4
Vendor	ADC Corporation
Registry	MA-L (24-bit, large block)
Country	JP
Example MAC	EC:42:B4:00:00:00

What this means

The IEEE assigned the MA-L block EC42B4 to ADC 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 EC:42:B4, it is ADC Corporation hardware.

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