Seyond MAC address blocks

The IEEE registry carries 2 blocks registered to Seyond, together 17.8 million addresses, first observed 22 Apr 2018, most recently 8 Apr 2026.

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
04:C3:E6:4	MA-M	1 million	US	22 Apr 2018
64:D3:63	MA-L	16.8 million	US	8 Apr 2026

Every block registered to Seyond 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.