What this means
The IEEE assigned the MA-L block DC1D9F to U & B tech. 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 DC:1D:9F, it is U & B tech hardware.
Frequently Asked Questions
Who owns MAC prefix DC1D9F?
DC1D9F is registered to U & B tech 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. U & B tech's block covers 16,777,216 addresses.
What devices use DC1D9F?
Any network device with a MAC address starting DC:1D:9F was manufactured by or for U & B tech.