What this means
The IEEE assigned the MA-M block F87A39E to Cognosos, Inc.. 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 F8:7A:39:E, it is Cognosos, Inc. hardware.
Frequently Asked Questions
Who owns MAC prefix F87A39E?
F87A39E is registered to Cognosos, Inc. 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. Cognosos, Inc.'s block covers 1,048,576 addresses.
What devices use F87A39E?
Any network device with a MAC address starting F8:7A:39:E was manufactured by or for Cognosos, Inc..