HORIZON.INC MAC address blocks

The IEEE registry carries 6 blocks registered to HORIZON.INC, together 24.6 thousand addresses, first observed 7 Aug 2011, most recently 29 Jun 2026.

Registered in JP.

Its portfolio also includes blocks acquired from Horizon Co., Ltd × 2 · TAIYO SEIKI CO.,LTD. × 2.

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
00:50:C2:E6:0	IAB	4.1 thousand	JP	7 Aug 2011
70:B3:D5:69:B	MA-S	4.1 thousand	JP	1 Jul 2019
70:B3:D5:F4:0	MA-S	4.1 thousand	JP	20 Mar 2021
8C:1F:64:03:D	MA-S	4.1 thousand	JP	28 Jun 2023
8C:1F:64:F0:A	MA-S	4.1 thousand	JP	15 Mar 2025
8C:1F:64:F2:9	MA-S	4.1 thousand	JP	29 Jun 2026

Every block registered to HORIZON.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.