What this means
The IEEE assigned the MA-L block C43772 to Virtuozzo International 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 C4:37:72, it is Virtuozzo International GmbH hardware.
Frequently Asked Questions
Who owns MAC prefix C43772?
C43772 is registered to Virtuozzo International 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. Virtuozzo International GmbH's block covers 16,777,216 addresses.
What devices use C43772?
Any network device with a MAC address starting C4:37:72 was manufactured by or for Virtuozzo International GmbH.