What this means
The IEEE assigned the MA-L block 042F56 to ATOCS (Shenzhen) LTD. 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 04:2F:56, it is ATOCS (Shenzhen) LTD hardware.
Frequently Asked Questions
Who owns MAC prefix 042F56?
042F56 is registered to ATOCS (Shenzhen) LTD 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. ATOCS (Shenzhen) LTD's block covers 16,777,216 addresses.
What devices use 042F56?
Any network device with a MAC address starting 04:2F:56 was manufactured by or for ATOCS (Shenzhen) LTD.