What this means
The IEEE assigned the MA-L block 001C5A to Advanced Relay Corporation. 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 00:1C:5A, it is Advanced Relay Corporation hardware.
Frequently Asked Questions
Who owns MAC prefix 001C5A?
001C5A is registered to Advanced Relay Corporation 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. Advanced Relay Corporation's block covers 16,777,216 addresses.
What devices use 001C5A?
Any network device with a MAC address starting 00:1C:5A was manufactured by or for Advanced Relay Corporation.