Who owns MAC prefix 745BC55?

745BC55 is registered to SpringCard in the IEEE MA-M registry.

What devices use 745BC55?

Any network device with a MAC address starting 74:5B:C5:5 was manufactured by or for SpringCard.

MA-M · OUI prefix

SpringCard

Any MAC address starting 74:5B:C5:5 is registered to SpringCard in FR.

OUI prefix	745BC55
Vendor	SpringCard
Registry	MA-M (28-bit, medium block)
Country	FR
Example MAC	74:5B:C5:5:00:00:00

What this means

The IEEE assigned the MA-M block 745BC55 to SpringCard. 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 74:5B:C5:5, it is SpringCard hardware.

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