What this means
The IEEE assigned the MA-L block C4EFBB to LCFC(Hefei) Electronics Technology co., 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 C4:EF:BB, it is LCFC(Hefei) Electronics Technology co., ltd hardware.
Frequently Asked Questions
Who owns MAC prefix C4EFBB?
C4EFBB is registered to LCFC(Hefei) Electronics Technology co., 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. LCFC(Hefei) Electronics Technology co., ltd's block covers 16,777,216 addresses.
What devices use C4EFBB?
Any network device with a MAC address starting C4:EF:BB was manufactured by or for LCFC(Hefei) Electronics Technology co., ltd.