FOUR PHASE SYSTEMS - MAC Prefix 08005C (MA-L)

What this means

The IEEE assigned the MA-L block 08005C to FOUR PHASE SYSTEMS. 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 08:00:5C, it is FOUR PHASE SYSTEMS hardware.

Frequently Asked Questions

Who owns MAC prefix 08005C?

08005C is registered to FOUR PHASE SYSTEMS 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. FOUR PHASE SYSTEMS's block covers 16,777,216 addresses.

What devices use 08005C?

Any network device with a MAC address starting 08:00:5C was manufactured by or for FOUR PHASE SYSTEMS.

OUI prefix	08005C
Vendor	FOUR PHASE SYSTEMS
Registry	MA-L (24-bit, large block)
Block size	16,777,216 addresses
Country	US
Other blocks by this vendor	1 total
Example MAC	08:00:5C:00:00:00