Who owns MAC prefix 501AC5?

501AC5 is registered to Microsoft in the IEEE MA-L registry.

What devices use 501AC5?

Any network device with a MAC address starting 50:1A:C5 was manufactured by or for Microsoft.

MA-L · OUI prefix

Microsoft

Any MAC address starting 50:1A:C5 is registered to Microsoft in US.

OUI prefix	501AC5
Vendor	Microsoft
Registry	MA-L (24-bit, large block)
Country	US
Example MAC	50:1A:C5:00:00:00

What this means

The IEEE assigned the MA-L block 501AC5 to Microsoft. 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 50:1A:C5, it is Microsoft hardware.

Other Microsoft prefixes

Microsoft holds 9 registered blocks in total.

3059B7 4C0BBE 5882A8 6045BD 7C1E52 7CED8D B4AE2B C0335E

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