Vendor registration identifies the organization holding a block, not a specific device model, product line, or manufacturing date. This page combines every block IEEE has registered under this exact organization name; it doesn't mean every address in every listed block is currently shipping in a real device.
About SiFive Inc
SiFive designs RISC-V processors and development boards.
Devices that use these prefixes
- RISC-V boards and system-on-chip hardware
Frequently asked questions
Does this prefix name the product?
It identifies the component inside, which is built into products from many brands, so the prefix names the part, not the finished device.
Assignments by type
| Type | Count |
|---|---|
| MA-S | 4 |
Countries in IEEE's registration records
| Country | Blocks |
|---|---|
| 🇺🇸 United States | 4 |
Download this organization's blocks
Get just these assignments as CSV or JSON, generated fresh from the live registry on every request.
4 registered prefixes