What this means
The IEEE assigned the MA-L block 3CA72B to MRV Communications (Networks) 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 3C:A7:2B, it is MRV Communications (Networks) LTD hardware.
Frequently Asked Questions
Who owns MAC prefix 3CA72B?
3CA72B is registered to MRV Communications (Networks) 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. MRV Communications (Networks) LTD's block covers 16,777,216 addresses.
What devices use 3CA72B?
Any network device with a MAC address starting 3C:A7:2B was manufactured by or for MRV Communications (Networks) LTD.