Who owns MAC prefix B437D11?

B437D11 is registered to Alturna Networks in the IEEE MA-M registry.

What devices use B437D11?

Any network device with a MAC address starting B4:37:D1:1 was manufactured by or for Alturna Networks.

MA-M · OUI prefix

Alturna Networks

Any MAC address starting B4:37:D1:1 is registered to Alturna Networks in EC.

OUI prefix	B437D11
Vendor	Alturna Networks
Registry	MA-M (28-bit, medium block)
Country	EC
Example MAC	B4:37:D1:1:00:00:00

What this means

The IEEE assigned the MA-M block B437D11 to Alturna Networks. 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 B4:37:D1:1, it is Alturna Networks hardware.

Other Alturna Networks prefixes

Alturna Networks holds 2 registered blocks in total.

70B3D5714

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