SiFive Inc MAC address blocks

The IEEE registry carries 4 blocks registered to SiFive Inc, together 16.4 thousand addresses, first observed 11 Feb 2018, most recently 7 Jan 2025.

Registered in US.

Cumulative address space by first-observed date on a linear scale sized to this chart; hover for date and total.

Prefix	Block	Addresses	Country	First registered
70:B3:D5:92:F	MA-S	4.1 thousand	US	11 Feb 2018
8C:1F:64:13:C	MA-S	4.1 thousand	US	13 Mar 2024
8C:1F:64:E8:8	MA-S	4.1 thousand	US	13 Nov 2024
8C:1F:64:E9:A	MA-S	4.1 thousand	US	7 Jan 2025

Every block registered to SiFive Inc in the IEEE registries, complete. Free-text search also matches former owners.

Complete as of the current IEEE registry deploy. Dates are when each registration was first observed in public data, not legal assignment dates.