What this means
The IEEE assigned the MA-L block A47C1F to Cobham plc. 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 A4:7C:1F, it is Cobham plc hardware.
Frequently Asked Questions
Who owns MAC prefix A47C1F?
A47C1F is registered to Cobham plc 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. Cobham plc's block covers 16,777,216 addresses.
What devices use A47C1F?
Any network device with a MAC address starting A4:7C:1F was manufactured by or for Cobham plc.