What this means
The IEEE assigned the MA-L block D490E0 to Wachendorff Automation 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 D4:90:E0, it is Wachendorff Automation GmbH & CO.KG hardware.
Frequently Asked Questions
Who owns MAC prefix D490E0?
D490E0 is registered to Wachendorff Automation 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. Wachendorff Automation GmbH & CO.KG's block covers 16,777,216 addresses.
What devices use D490E0?
Any network device with a MAC address starting D4:90:E0 was manufactured by or for Wachendorff Automation GmbH & CO.KG.