What this means
The IEEE assigned the MA-L block 0015B3 to Caretech AB. 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 00:15:B3, it is Caretech AB hardware.
Frequently Asked Questions
Who owns MAC prefix 0015B3?
0015B3 is registered to Caretech AB 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. Caretech AB's block covers 16,777,216 addresses.
What devices use 0015B3?
Any network device with a MAC address starting 00:15:B3 was manufactured by or for Caretech AB.