Who owns MAC prefix 205F3D?

205F3D is registered to Adtran Inc in the IEEE MA-L registry.

What devices use 205F3D?

Any network device with a MAC address starting 20:5F:3D was manufactured by or for Adtran Inc.

MA-L · OUI prefix

Adtran Inc

Any MAC address starting 20:5F:3D is registered to Adtran Inc.

OUI prefix	205F3D
Vendor	Adtran Inc
Registry	MA-L (24-bit, large block)
Example MAC	20:5F:3D:00:00:00

What this means

The IEEE assigned the MA-L block 205F3D to Adtran 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 20:5F:3D, it is Adtran Inc hardware.

Other Adtran Inc prefixes

Adtran Inc holds 15 registered blocks in total.

00014F 001992 002445 00A0C8 28D0CB 38F8F6 5422E0 588785 64A0AC 844D4C AC139C AC51EE all 15 »

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