What this means
The IEEE assigned the MA-L block 40F52E to Leica Microsystems (Schweiz) AG. 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:F5:2E, it is Leica Microsystems (Schweiz) AG hardware.
Frequently Asked Questions
Who owns MAC prefix 40F52E?
40F52E is registered to Leica Microsystems (Schweiz) AG 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. Leica Microsystems (Schweiz) AG's block covers 16,777,216 addresses.
What devices use 40F52E?
Any network device with a MAC address starting 40:F5:2E was manufactured by or for Leica Microsystems (Schweiz) AG.