What this means
The IEEE assigned the MA-L block 00901B to DIGITAL CONTROLS. 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 00:90:1B, it is DIGITAL CONTROLS hardware.
Frequently Asked Questions
Who owns MAC prefix 00901B?
00901B is registered to DIGITAL CONTROLS 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. DIGITAL CONTROLS's block covers 16,777,216 addresses.
What devices use 00901B?
Any network device with a MAC address starting 00:90:1B was manufactured by or for DIGITAL CONTROLS.