What this means
The IEEE assigned the MA-L block 00257B to STJ ELECTRONICS PVT LTD. 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 00:25:7B, it is STJ ELECTRONICS PVT LTD hardware.
Frequently Asked Questions
Who owns MAC prefix 00257B?
00257B is registered to STJ ELECTRONICS PVT LTD 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. STJ ELECTRONICS PVT LTD's block covers 16,777,216 addresses.
What devices use 00257B?
Any network device with a MAC address starting 00:25:7B was manufactured by or for STJ ELECTRONICS PVT LTD.