What this means
The IEEE assigned the MA-L block 00031C to Svenska Hardvarufabriken AB. 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 00:03:1C, it is Svenska Hardvarufabriken AB hardware.
Frequently Asked Questions
Who owns MAC prefix 00031C?
00031C is registered to Svenska Hardvarufabriken AB 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. Svenska Hardvarufabriken AB's block covers 16,777,216 addresses.
What devices use 00031C?
Any network device with a MAC address starting 00:03:1C was manufactured by or for Svenska Hardvarufabriken AB.