What this means
The IEEE assigned the MA-L block 20AA4B to Cisco-Linksys, LLC. 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:AA:4B, it is Cisco-Linksys, LLC hardware.
Frequently Asked Questions
Who owns MAC prefix 20AA4B?
20AA4B is registered to Cisco-Linksys, LLC 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. Cisco-Linksys, LLC's block covers 16,777,216 addresses.
What devices use 20AA4B?
Any network device with a MAC address starting 20:AA:4B was manufactured by or for Cisco-Linksys, LLC.