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