What this means
The IEEE assigned the MA-M block EC74CDB to Hitachi Rail GTS Austria GmbH. 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:74:CD:B, it is Hitachi Rail GTS Austria GmbH hardware.
Frequently Asked Questions
Who owns MAC prefix EC74CDB?
EC74CDB is registered to Hitachi Rail GTS Austria GmbH in the IEEE MA-M registry.
What does the MA-M registry type mean?
An MA-M assignment covers 28 bits of the address, giving the vendor 1,048,576 device addresses, a quarter of a full MA-L block. Hitachi Rail GTS Austria GmbH's block covers 1,048,576 addresses.
What devices use EC74CDB?
Any network device with a MAC address starting EC:74:CD:B was manufactured by or for Hitachi Rail GTS Austria GmbH.