What this means
The IEEE assigned the MA-L block F81CE5 to Telefonbau Behnke 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 F8:1C:E5, it is Telefonbau Behnke GmbH hardware.
Frequently Asked Questions
Who owns MAC prefix F81CE5?
F81CE5 is registered to Telefonbau Behnke GmbH in the IEEE MA-L registry.
What does the MA-L registry type mean?
An MA-L assignment, the IEEE's original OUI format, gives the vendor the first three octets and 16,777,216 device addresses under them. Telefonbau Behnke GmbH's block covers 16,777,216 addresses.
What devices use F81CE5?
Any network device with a MAC address starting F8:1C:E5 was manufactured by or for Telefonbau Behnke GmbH.