Who owns MAC prefix B4DF91?

B4DF91 is registered to Cisco Meraki in the IEEE MA-L registry.

What devices use B4DF91?

Any network device with a MAC address starting B4:DF:91 was manufactured by or for Cisco Meraki.

MA-L · OUI prefix

Cisco Meraki

Any MAC address starting B4:DF:91 is registered to Cisco Meraki in US.

OUI prefix	B4DF91
Vendor	Cisco Meraki
Registry	MA-L (24-bit, large block)
Country	US
Example MAC	B4:DF:91:00:00:00

What this means

The IEEE assigned the MA-L block B4DF91 to Cisco Meraki. 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 B4:DF:91, it is Cisco Meraki hardware.

Other Cisco Meraki prefixes

Cisco Meraki holds 57 registered blocks in total.

00180A 00841E 086A0B 08711C 08F1B3 0C7BC8 0C8DDB 149F43 1CE587 2C3F0B 303B49 3456FE all 57 »

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