Which company owns MAC address prefix F8:69:71?

MAC address prefix F8:69:71 is registered to Seibu Electric Co., in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with F8:69:71 has a network interface built by Seibu Electric Co.,.

What is the OUI F8:69:71?

F8:69:71 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Seibu Electric Co.,. It covers every address from F8:69:71:00:00:00 to F8:69:71:FF:FF:FF, or 16,777,216 addresses in total. It is also written F8-69-71.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in F8:69:71:00:00:00 that is F8:69:71 — and look that prefix up in the IEEE OUI registry. If the second-lowest bit of the first octet is set, the address is locally administered (a randomized or private MAC), which belongs to no manufacturer and will not resolve; modern phones and laptops use these by default on each network.

Where is Seibu Electric Co., located?

Seibu Electric Co., is listed at 1458-7 Hachioji Tokyo JP 193-0941 in the IEEE OUI registry entry for F8:69:71. This is the address the organization registered with the IEEE, which may differ from its current operating address.

Seibu Electric Co.,

MAC address prefix F8:69:71 is registered to Seibu Electric Co., in the IEEE OUI registry. Any device whose MAC address begins with F8:69:71 has a network interface built by Seibu Electric Co.,. This prefix (the OUI, or Organizationally Unique Identifier) is assigned by the IEEE and is the first three octets of the address — it covers every MAC from F8:69:71:00:00:00 to F8:69:71:FF:FF:FF.

OUI prefix: F8:69:71
Hyphen form: F8-69-71
MAC range: F8:69:71:00:00:00 – F8:69:71:FF:FF:FF
Addresses in block: 16,777,216
Organization: Seibu Electric Co.,
Address: 1458-7 Hachioji Tokyo JP 193-0941
Source: IEEE OUI registry

Have a full MAC address? Look it up— we'll also tell you if it's a randomized (private) address rather than a real manufacturer prefix.

Assignment history (2)

The IEEE registry publishes current state only — this is the change record we've kept since we started tracking it daily.

2016-07-29Assigned to "Seibu Electric Co.,"
archived source →
2026-07-17Assigned to "Seibu Electric Co.,"

Nearby in the registry

The prefixes assigned immediately before and after F8:69:71:

FAQ

Which company owns MAC address prefix F8:69:71?: MAC address prefix F8:69:71 is registered to Seibu Electric Co., in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with F8:69:71 has a network interface built by Seibu Electric Co.,.
What is the OUI F8:69:71?: F8:69:71 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Seibu Electric Co.,. It covers every address from F8:69:71:00:00:00 to F8:69:71:FF:FF:FF, or 16,777,216 addresses in total. It is also written F8-69-71.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in F8:69:71:00:00:00 that is F8:69:71 — and look that prefix up in the IEEE OUI registry. If the second-lowest bit of the first octet is set, the address is locally administered (a randomized or private MAC), which belongs to no manufacturer and will not resolve; modern phones and laptops use these by default on each network.
Where is Seibu Electric Co., located?: Seibu Electric Co., is listed at 1458-7 Hachioji Tokyo JP 193-0941 in the IEEE OUI registry entry for F8:69:71. This is the address the organization registered with the IEEE, which may differ from its current operating address.