What this means
The IEEE assigned the MA-L block 00400F to DATACOM TECHNOLOGIES. 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 00:40:0F, it is DATACOM TECHNOLOGIES hardware.
Frequently Asked Questions
Who owns MAC prefix 00400F?
00400F is registered to DATACOM TECHNOLOGIES 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. DATACOM TECHNOLOGIES's block covers 16,777,216 addresses.
What devices use 00400F?
Any network device with a MAC address starting 00:40:0F was manufactured by or for DATACOM TECHNOLOGIES.