What this means
The IEEE assigned the MA-L block 90DAF9 to Siemens Rail Automation SAU. 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 90:DA:F9, it is Siemens Rail Automation SAU hardware.
Frequently Asked Questions
Who owns MAC prefix 90DAF9?
90DAF9 is registered to Siemens Rail Automation SAU 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. Siemens Rail Automation SAU's block covers 16,777,216 addresses.
What devices use 90DAF9?
Any network device with a MAC address starting 90:DA:F9 was manufactured by or for Siemens Rail Automation SAU.