What this means
The IEEE assigned the MA-L block E40274 to FW Murphy Production Controls. 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 E4:02:74, it is FW Murphy Production Controls hardware.
Frequently Asked Questions
Who owns MAC prefix E40274?
E40274 is registered to FW Murphy Production Controls 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. FW Murphy Production Controls's block covers 16,777,216 addresses.
What devices use E40274?
Any network device with a MAC address starting E4:02:74 was manufactured by or for FW Murphy Production Controls.