What this means
The IEEE assigned the MA-L block 00401F to COLORGRAPH 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 00:40:1F, it is COLORGRAPH LTD hardware.
Frequently Asked Questions
Who owns MAC prefix 00401F?
00401F is registered to COLORGRAPH 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. COLORGRAPH LTD's block covers 16,777,216 addresses.
What devices use 00401F?
Any network device with a MAC address starting 00:40:1F was manufactured by or for COLORGRAPH LTD.