What this means
The IEEE assigned the MA-M block 98F9C74 to Promess 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 98:F9:C7:4, it is Promess GmbH hardware.
Frequently Asked Questions
Who owns MAC prefix 98F9C74?
98F9C74 is registered to Promess 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. Promess GmbH's block covers 1,048,576 addresses.
What devices use 98F9C74?
Any network device with a MAC address starting 98:F9:C7:4 was manufactured by or for Promess GmbH.