What this means
The IEEE assigned the MA-L block 0025F7 to Ansaldo STS USA. 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:F7, it is Ansaldo STS USA hardware.
Frequently Asked Questions
Who owns MAC prefix 0025F7?
0025F7 is registered to Ansaldo STS USA 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. Ansaldo STS USA's block covers 16,777,216 addresses.
What devices use 0025F7?
Any network device with a MAC address starting 00:25:F7 was manufactured by or for Ansaldo STS USA.