What this means
The IEEE assigned the MA-L block 0040E8 to CHARLES RIVER DATA SYSTEMS,INC. 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:E8, it is CHARLES RIVER DATA SYSTEMS,INC hardware.
Frequently Asked Questions
Who owns MAC prefix 0040E8?
0040E8 is registered to CHARLES RIVER DATA SYSTEMS,INC 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. CHARLES RIVER DATA SYSTEMS,INC's block covers 16,777,216 addresses.
What devices use 0040E8?
Any network device with a MAC address starting 00:40:E8 was manufactured by or for CHARLES RIVER DATA SYSTEMS,INC.