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.
Frequently Asked Questions
Who owns MAC prefix 48C663?
48C663 is registered to GTO Access Systems LLC in the IEEE MA-L registry.
What does the MA-L registry type mean?
An MA-L assignment, the IEEE's original OUI format, gives the vendor the first three octets and 16,777,216 device addresses under them. GTO Access Systems LLC's block covers 16,777,216 addresses.
What devices use 48C663?
Any network device with a MAC address starting 48:C6:63 was manufactured by or for GTO Access Systems LLC.