What this means
The IEEE assigned the MA-L block 4001C6 to 3COM EUROPE 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 40:01:C6, it is 3COM EUROPE LTD hardware.
Frequently Asked Questions
Who owns MAC prefix 4001C6?
4001C6 is registered to 3COM EUROPE 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. 3COM EUROPE LTD's block covers 16,777,216 addresses.
What devices use 4001C6?
Any network device with a MAC address starting 40:01:C6 was manufactured by or for 3COM EUROPE LTD.