What this means
The IEEE assigned the MA-L block 00C343 to E-T-A Circuit Breakers 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 00:C3:43, it is E-T-A Circuit Breakers Ltd hardware.
Frequently Asked Questions
Who owns MAC prefix 00C343?
00C343 is registered to E-T-A Circuit Breakers 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. E-T-A Circuit Breakers Ltd's block covers 16,777,216 addresses.
What devices use 00C343?
Any network device with a MAC address starting 00:C3:43 was manufactured by or for E-T-A Circuit Breakers Ltd.