Who owns MAC prefix 70B3D5C90?

70B3D5C90 is registered to Diretta in the IEEE MA-S registry.

What devices use 70B3D5C90?

Any network device with a MAC address starting 70:B3:D5:C9:0 was manufactured by or for Diretta.

MA-S · OUI prefix

Diretta

Any MAC address starting 70:B3:D5:C9:0 is registered to Diretta in JP.

OUI prefix	70B3D5C90
Vendor	Diretta
Registry	MA-S (36-bit, small block)
Country	JP
Example MAC	70:B3:D5:C9:0:00:00:00

What this means

The IEEE assigned the MA-S block 70B3D5C90 to Diretta. 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:C9:0, it is Diretta hardware.

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