Who owns MAC prefix F85B1B?

F85B1B is registered to Espressif Inc. in the IEEE MA-L registry.

What devices use F85B1B?

Any network device with a MAC address starting F8:5B:1B was manufactured by or for Espressif Inc..

MA-L · OUI prefix

Espressif Inc.

Any MAC address starting F8:5B:1B is registered to Espressif Inc. in VG.

OUI prefix	F85B1B
Vendor	Espressif Inc.
Registry	MA-L (24-bit, large block)
Country	VG
Example MAC	F8:5B:1B:00:00:00

What this means

The IEEE assigned the MA-L block F85B1B to Espressif 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 F8:5B:1B, it is Espressif Inc. hardware.

Other Espressif Inc. prefixes

Espressif Inc. holds 335 registered blocks in total.

004B12 007007 048308 04B247 083A8D 083AF2 089272 08A6F7 08AD0A 08B61F 08D1F9 08F9E0 all 335 »

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