What this means
The IEEE assigned the MA-S block 70B3D55D0 to InterTalk Critical Information Systems. 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:D5:5D:0, it is InterTalk Critical Information Systems hardware.
Frequently Asked Questions
Who owns MAC prefix 70B3D55D0?
70B3D55D0 is registered to InterTalk Critical Information Systems 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. InterTalk Critical Information Systems's block covers 4,096 addresses.
What devices use 70B3D55D0?
Any network device with a MAC address starting 70:B3:D5:5D:0 was manufactured by or for InterTalk Critical Information Systems.