Who owns MAC prefix 48C663?

48C663 is registered to GTO Access Systems LLC in the IEEE MA-L registry.

What devices use 48C663?

Any network device with a MAC address starting 48:C6:63 was manufactured by or for GTO Access Systems LLC.

MA-L · OUI prefix

GTO Access Systems LLC

Any MAC address starting 48:C6:63 is registered to GTO Access Systems LLC in US.

OUI prefix	48C663
Vendor	GTO Access Systems LLC
Registry	MA-L (24-bit, large block)
Country	US
Example MAC	48:C6:63:00:00:00

What this means

The IEEE assigned the MA-L block 48C663 to GTO Access Systems 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 48:C6:63, it is GTO Access Systems LLC hardware.

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