Who owns MAC prefix 903DBD?

903DBD is registered to SECURE METERS LIMITED in the IEEE MA-L registry.

What devices use 903DBD?

Any network device with a MAC address starting 90:3D:BD was manufactured by or for SECURE METERS LIMITED.

MA-L · OUI prefix

SECURE METERS LIMITED

Any MAC address starting 90:3D:BD is registered to SECURE METERS LIMITED in IN.

OUI prefix	903DBD
Vendor	SECURE METERS LIMITED
Registry	MA-L (24-bit, large block)
Country	IN
Example MAC	90:3D:BD:00:00:00

What this means

The IEEE assigned the MA-L block 903DBD to SECURE METERS LIMITED. 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 90:3D:BD, it is SECURE METERS LIMITED hardware.

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