What this means
The IEEE assigned the MA-L block 000658 to Helmut Fischer GmbH Institut für Elektronik und Messtechnik. 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 00:06:58, it is Helmut Fischer GmbH Institut für Elektronik und Messtechnik hardware.
Frequently Asked Questions
Who owns MAC prefix 000658?
000658 is registered to Helmut Fischer GmbH Institut für Elektronik und Messtechnik 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. Helmut Fischer GmbH Institut für Elektronik und Messtechnik's block covers 16,777,216 addresses.
What devices use 000658?
Any network device with a MAC address starting 00:06:58 was manufactured by or for Helmut Fischer GmbH Institut für Elektronik und Messtechnik.