What this means
The IEEE assigned the MA-S block 70B3D59AA to Tecsys do Brasil Industrial Ltda. 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:D5:9A:A, it is Tecsys do Brasil Industrial Ltda hardware.
Frequently Asked Questions
Who owns MAC prefix 70B3D59AA?
70B3D59AA is registered to Tecsys do Brasil Industrial Ltda 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. Tecsys do Brasil Industrial Ltda's block covers 4,096 addresses.
What devices use 70B3D59AA?
Any network device with a MAC address starting 70:B3:D5:9A:A was manufactured by or for Tecsys do Brasil Industrial Ltda.