What this means
The IEEE assigned the MA-M block 40ED989 to TeraTron 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 40:ED:98:9, it is TeraTron GmbH hardware.
Frequently Asked Questions
Who owns MAC prefix 40ED989?
40ED989 is registered to TeraTron 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. TeraTron GmbH's block covers 1,048,576 addresses.
What devices use 40ED989?
Any network device with a MAC address starting 40:ED:98:9 was manufactured by or for TeraTron GmbH.