What this means
The IEEE assigned the MA-L block D49C28 to JayBird 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 D4:9C:28, it is JayBird LLC hardware.
Frequently Asked Questions
Who owns MAC prefix D49C28?
D49C28 is registered to JayBird 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. JayBird LLC's block covers 16,777,216 addresses.
What devices use D49C28?
Any network device with a MAC address starting D4:9C:28 was manufactured by or for JayBird LLC.