What this means
The IEEE assigned the MA-L block 740BB0 to Hirschmann Automation and Control GmbH. 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 74:0B:B0, it is Hirschmann Automation and Control GmbH hardware.
Frequently Asked Questions
Who owns MAC prefix 740BB0?
740BB0 is registered to Hirschmann Automation and Control GmbH 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. Hirschmann Automation and Control GmbH's block covers 16,777,216 addresses.
What devices use 740BB0?
Any network device with a MAC address starting 74:0B:B0 was manufactured by or for Hirschmann Automation and Control GmbH.