What this means
The IEEE assigned the MA-L block 187EB9 to Apple, Inc.. 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 18:7E:B9, it is Apple, Inc. hardware.
Frequently Asked Questions
Who owns MAC prefix 187EB9?
187EB9 is registered to Apple, Inc. 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. Apple, Inc.'s block covers 16,777,216 addresses.
What devices use 187EB9?
Any network device with a MAC address starting 18:7E:B9 was manufactured by or for Apple, Inc..