What this means
The IEEE assigned the MA-M block 18D7937 to JFA Electronics Industry and Commerce EIRELI. 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 18:D7:93:7, it is JFA Electronics Industry and Commerce EIRELI hardware.
Frequently Asked Questions
Who owns MAC prefix 18D7937?
18D7937 is registered to JFA Electronics Industry and Commerce EIRELI in the IEEE MA-M registry.
What does the MA-M registry type mean?
An MA-M assignment covers 28 bits of the address, giving the vendor 1,048,576 device addresses, a quarter of a full MA-L block. JFA Electronics Industry and Commerce EIRELI's block covers 1,048,576 addresses.
What devices use 18D7937?
Any network device with a MAC address starting 18:D7:93:7 was manufactured by or for JFA Electronics Industry and Commerce EIRELI.