Who owns MAC prefix EC5BCD9?

EC5BCD9 is registered to C&D Technologies in the IEEE MA-M registry.

What devices use EC5BCD9?

Any network device with a MAC address starting EC:5B:CD:9 was manufactured by or for C&D Technologies.

MA-M · OUI prefix

C&D Technologies

Any MAC address starting EC:5B:CD:9 is registered to C&D Technologies in US.

OUI prefix	EC5BCD9
Vendor	C&D Technologies
Registry	MA-M (28-bit, medium block)
Country	US
Example MAC	EC:5B:CD:9:00:00:00

What this means

The IEEE assigned the MA-M block EC5BCD9 to C&D Technologies. 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:5B:CD:9, it is C&D Technologies hardware.

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