Who owns MAC prefix AC9FC3?

AC9FC3 is registered to Ring LLC in the IEEE MA-L registry.

What devices use AC9FC3?

Any network device with a MAC address starting AC:9F:C3 was manufactured by or for Ring LLC.

MA-L · OUI prefix

Ring LLC

Any MAC address starting AC:9F:C3 is registered to Ring LLC in US.

OUI prefix	AC9FC3
Vendor	Ring LLC
Registry	MA-L (24-bit, large block)
Country	US
Example MAC	AC:9F:C3:00:00:00

What this means

The IEEE assigned the MA-L block AC9FC3 to Ring LLC. 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 AC:9F:C3, it is Ring LLC hardware.

Other Ring LLC prefixes

Ring LLC holds 13 registered blocks in total.

00B463 187F88 242BD6 343EA4 54E019 50E467 5C475E 649A63 90486C 9C7613 C4DBAD CC3BFB

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