Who owns MAC prefix F4B3B1?

F4B3B1 is registered to Silicon Laboratories in the IEEE MA-L registry.

What devices use F4B3B1?

Any network device with a MAC address starting F4:B3:B1 was manufactured by or for Silicon Laboratories.

MA-L · OUI prefix

Silicon Laboratories

Any MAC address starting F4:B3:B1 is registered to Silicon Laboratories in US.

OUI prefix	F4B3B1
Vendor	Silicon Laboratories
Registry	MA-L (24-bit, large block)
Country	US
Example MAC	F4:B3:B1:00:00:00

What this means

The IEEE assigned the MA-L block F4B3B1 to Silicon Laboratories. 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 F4:B3:B1, it is Silicon Laboratories hardware.

Other Silicon Laboratories prefixes

Silicon Laboratories holds 154 registered blocks in total.

000B57 003C84 00BE44 040D84 048727 04CD15 04E3E5 086BD7 08B95F 08DDEB 08FD52 0C2A6F all 154 »

Look up another MAC