What this means
The IEEE assigned the MA-L block 0030CA to Discovery Com. 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 00:30:CA, it is Discovery Com hardware.
Frequently Asked Questions
Who owns MAC prefix 0030CA?
0030CA is registered to Discovery Com 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. Discovery Com's block covers 16,777,216 addresses.
What devices use 0030CA?
Any network device with a MAC address starting 00:30:CA was manufactured by or for Discovery Com.