What this means
The IEEE assigned the MA-L block ECF35B to Nokia Corporation. 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 EC:F3:5B, it is Nokia Corporation hardware.
Frequently Asked Questions
Who owns MAC prefix ECF35B?
ECF35B is registered to Nokia Corporation 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. Nokia Corporation's block covers 16,777,216 addresses.
What devices use ECF35B?
Any network device with a MAC address starting EC:F3:5B was manufactured by or for Nokia Corporation.