What this means
The IEEE assigned the MA-L block F0463B to Comcast Cable Corporation. 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 F0:46:3B, it is Comcast Cable Corporation hardware.
Frequently Asked Questions
Who owns MAC prefix F0463B?
F0463B is registered to Comcast Cable Corporation 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. Comcast Cable Corporation's block covers 16,777,216 addresses.
What devices use F0463B?
Any network device with a MAC address starting F0:46:3B was manufactured by or for Comcast Cable Corporation.