Who owns MAC prefix 20B399?

20B399 is registered to Enterasys in the IEEE MA-L registry.

What devices use 20B399?

Any network device with a MAC address starting 20:B3:99 was manufactured by or for Enterasys.

MA-L · OUI prefix

Enterasys

Any MAC address starting 20:B3:99 is registered to Enterasys in US.

OUI prefix	20B399
Vendor	Enterasys
Registry	MA-L (24-bit, large block)
Country	US
Example MAC	20:B3:99:00:00:00

What this means

The IEEE assigned the MA-L block 20B399 to Enterasys. 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:B3:99, it is Enterasys hardware.

Other Enterasys prefixes

Enterasys holds 4 registered blocks in total.

0001F4 001188 001F45

Look up another MAC