Who owns MAC prefix 00133E?

00133E is registered to MetaSwitch in the IEEE MA-L registry.

What devices use 00133E?

Any network device with a MAC address starting 00:13:3E was manufactured by or for MetaSwitch.

MA-L · OUI prefix

MetaSwitch

Any MAC address starting 00:13:3E is registered to MetaSwitch in US.

OUI prefix	00133E
Vendor	MetaSwitch
Registry	MA-L (24-bit, large block)
Country	US
Example MAC	00:13:3E:00:00:00

What this means

The IEEE assigned the MA-L block 00133E to MetaSwitch. 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 00:13:3E, it is MetaSwitch hardware.

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