What this means
The IEEE assigned the MA-L block 00407A to SOCIETE D'EXPLOITATION DU CNIT. 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 00:40:7A, it is SOCIETE D'EXPLOITATION DU CNIT hardware.
Frequently Asked Questions
Who owns MAC prefix 00407A?
00407A is registered to SOCIETE D'EXPLOITATION DU CNIT 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. SOCIETE D'EXPLOITATION DU CNIT's block covers 16,777,216 addresses.
What devices use 00407A?
Any network device with a MAC address starting 00:40:7A was manufactured by or for SOCIETE D'EXPLOITATION DU CNIT.