What this means
The IEEE assigned the MA-L block 148F21 to Garmin International. 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 14:8F:21, it is Garmin International hardware.
Frequently Asked Questions
Who owns MAC prefix 148F21?
148F21 is registered to Garmin International 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. Garmin International's block covers 16,777,216 addresses.
What devices use 148F21?
Any network device with a MAC address starting 14:8F:21 was manufactured by or for Garmin International.