What this means
The IEEE assigned the MA-L block 00031B to Cellvision Systems, Inc.. 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 00:03:1B, it is Cellvision Systems, Inc. hardware.
Frequently Asked Questions
Who owns MAC prefix 00031B?
00031B is registered to Cellvision Systems, Inc. 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. Cellvision Systems, Inc.'s block covers 16,777,216 addresses.
What devices use 00031B?
Any network device with a MAC address starting 00:03:1B was manufactured by or for Cellvision Systems, Inc..