What this means
The IEEE assigned the MA-L block E45F01 to Raspberry Pi Trading 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 E4:5F:01, it is Raspberry Pi Trading Ltd hardware.
Frequently Asked Questions
Who owns MAC prefix E45F01?
E45F01 is registered to Raspberry Pi Trading 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. Raspberry Pi Trading Ltd's block covers 16,777,216 addresses.
What devices use E45F01?
Any network device with a MAC address starting E4:5F:01 was manufactured by or for Raspberry Pi Trading Ltd.