Who owns MAC prefix 781C9D?

781C9D is registered to Silicon Laboratories in the IEEE MA-L registry.

What devices use 781C9D?

Any network device with a MAC address starting 78:1C:9D was manufactured by or for Silicon Laboratories.

MA-L · OUI prefix

Silicon Laboratories

Any MAC address starting 78:1C:9D is registered to Silicon Laboratories in US.

OUI prefix	781C9D
Vendor	Silicon Laboratories
Registry	MA-L (24-bit, large block)
Country	US
Example MAC	78:1C:9D:00:00:00

What this means

The IEEE assigned the MA-L block 781C9D 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 78:1C:9D, 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 »

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