What this means
The IEEE assigned the MA-L block 2877B1 to Tri plus grupa d.o.o.. 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 28:77:B1, it is Tri plus grupa d.o.o. hardware.
Frequently Asked Questions
Who owns MAC prefix 2877B1?
2877B1 is registered to Tri plus grupa d.o.o. 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. Tri plus grupa d.o.o.'s block covers 16,777,216 addresses.
What devices use 2877B1?
Any network device with a MAC address starting 28:77:B1 was manufactured by or for Tri plus grupa d.o.o..