What this means
The IEEE assigned the MA-L block 00A055 to Data Device Corporation. 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:A0:55, it is Data Device Corporation hardware.
Frequently Asked Questions
Who owns MAC prefix 00A055?
00A055 is registered to Data Device Corporation 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. Data Device Corporation's block covers 16,777,216 addresses.
What devices use 00A055?
Any network device with a MAC address starting 00:A0:55 was manufactured by or for Data Device Corporation.