What this means
The IEEE assigned the MA-L block 187F88 to Ring 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 18:7F:88, it is Ring LLC hardware.
Frequently Asked Questions
Who owns MAC prefix 187F88?
187F88 is registered to Ring 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. Ring LLC's block covers 16,777,216 addresses.
What devices use 187F88?
Any network device with a MAC address starting 18:7F:88 was manufactured by or for Ring LLC.