What this means
The IEEE assigned the MA-L block A45C25 to Texas Instruments. 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 A4:5C:25, it is Texas Instruments hardware.
Frequently Asked Questions
Who owns MAC prefix A45C25?
A45C25 is registered to Texas Instruments 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. Texas Instruments's block covers 16,777,216 addresses.
What devices use A45C25?
Any network device with a MAC address starting A4:5C:25 was manufactured by or for Texas Instruments.