What this means
The IEEE assigned the MA-S block 70B3D5D1D to Stuyts Engineering Haarlem BV. 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 70:B3:D5:D1:D, it is Stuyts Engineering Haarlem BV hardware.
Frequently Asked Questions
Who owns MAC prefix 70B3D5D1D?
70B3D5D1D is registered to Stuyts Engineering Haarlem BV in the IEEE MA-S registry.
What does the MA-S registry type mean?
An MA-S assignment, formerly called OUI-36, covers 36 bits, giving the vendor 4,096 device addresses, the smallest block the IEEE issues. Stuyts Engineering Haarlem BV's block covers 4,096 addresses.
What devices use 70B3D5D1D?
Any network device with a MAC address starting 70:B3:D5:D1:D was manufactured by or for Stuyts Engineering Haarlem BV.