What this means
The IEEE assigned the MA-L block 549F13 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 54:9F:13, it is Apple, Inc. hardware.
Frequently Asked Questions
Who owns MAC prefix 549F13?
549F13 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 549F13?
Any network device with a MAC address starting 54:9F:13 was manufactured by or for Apple, Inc..