What this means
The IEEE assigned the MA-L block 581F19 to EMH Metering GmbH & Co. KG. 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 58:1F:19, it is EMH Metering GmbH & Co. KG hardware.
Frequently Asked Questions
Who owns MAC prefix 581F19?
581F19 is registered to EMH Metering GmbH & Co. KG 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. EMH Metering GmbH & Co. KG's block covers 16,777,216 addresses.
What devices use 581F19?
Any network device with a MAC address starting 58:1F:19 was manufactured by or for EMH Metering GmbH & Co. KG.