Who owns MAC prefix 0003B5?

0003B5 is registered to Entra Technology Co. in the IEEE MA-L registry.

What devices use 0003B5?

Any network device with a MAC address starting 00:03:B5 was manufactured by or for Entra Technology Co..

MA-L · OUI prefix

Entra Technology Co.

Any MAC address starting 00:03:B5 is registered to Entra Technology Co..

OUI prefix	0003B5
Vendor	Entra Technology Co.
Registry	MA-L (24-bit, large block)
Example MAC	00:03:B5:00:00:00

What this means

The IEEE assigned the MA-L block 0003B5 to Entra Technology Co.. 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 00:03:B5, it is Entra Technology Co. hardware.

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