What this means
The IEEE assigned the MA-L block 001CB4 to Iridium Satellite LLC. 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:B4, it is Iridium Satellite LLC hardware.
Frequently Asked Questions
Who owns MAC prefix 001CB4?
001CB4 is registered to Iridium Satellite LLC 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. Iridium Satellite LLC's block covers 16,777,216 addresses.
What devices use 001CB4?
Any network device with a MAC address starting 00:1C:B4 was manufactured by or for Iridium Satellite LLC.