What this means
The IEEE assigned the MA-L block 004043 to Nokia Siemens Networks 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 00:40:43, it is Nokia Siemens Networks GmbH & Co. KG. hardware.
Frequently Asked Questions
Who owns MAC prefix 004043?
004043 is registered to Nokia Siemens Networks 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. Nokia Siemens Networks GmbH & Co. KG.'s block covers 16,777,216 addresses.
What devices use 004043?
Any network device with a MAC address starting 00:40:43 was manufactured by or for Nokia Siemens Networks GmbH & Co. KG..