What this means
The IEEE assigned the MA-L block 001DA9 to Castles Technology, Co., LTD. 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 00:1D:A9, it is Castles Technology, Co., LTD hardware.
Frequently Asked Questions
Who owns MAC prefix 001DA9?
001DA9 is registered to Castles Technology, Co., LTD 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. Castles Technology, Co., LTD's block covers 16,777,216 addresses.
What devices use 001DA9?
Any network device with a MAC address starting 00:1D:A9 was manufactured by or for Castles Technology, Co., LTD.