What this means
The IEEE assigned the MA-L block 20DE1E to Nokia. 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 20:DE:1E, it is Nokia hardware.
Frequently Asked Questions
Who owns MAC prefix 20DE1E?
20DE1E is registered to Nokia 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's block covers 16,777,216 addresses.
What devices use 20DE1E?
Any network device with a MAC address starting 20:DE:1E was manufactured by or for Nokia.