What this means
The IEEE assigned the MA-L block 0040E7 to ARNOS INSTRUMENTS & COMPUTER. 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:E7, it is ARNOS INSTRUMENTS & COMPUTER hardware.
Frequently Asked Questions
Who owns MAC prefix 0040E7?
0040E7 is registered to ARNOS INSTRUMENTS & COMPUTER 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. ARNOS INSTRUMENTS & COMPUTER's block covers 16,777,216 addresses.
What devices use 0040E7?
Any network device with a MAC address starting 00:40:E7 was manufactured by or for ARNOS INSTRUMENTS & COMPUTER.