Which company owns MAC address prefix E4:46:B0?

MAC address prefix E4:46:B0 is registered to Fujitsu Client Computing Limited in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with E4:46:B0 has a network interface built by Fujitsu Client Computing Limited.

What is the OUI E4:46:B0?

E4:46:B0 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Fujitsu Client Computing Limited. It covers every address from E4:46:B0:00:00:00 to E4:46:B0:FF:FF:FF, or 16,777,216 addresses in total. It is also written E4-46-B0.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in E4:46:B0:00:00:00 that is E4:46:B0 — 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 Fujitsu Client Computing Limited located?

Fujitsu Client Computing Limited is listed at 1-1-2 Kashimada, Saiwai-ku Kawasaki Kanagawa JP 212-0058 in the IEEE OUI registry entry for E4:46:B0. This is the address the organization registered with the IEEE, which may differ from its current operating address.

Fujitsu Client Computing Limited

MAC address prefix E4:46:B0 is registered to Fujitsu Client Computing Limited in the IEEE OUI registry. Any device whose MAC address begins with E4:46:B0 has a network interface built by Fujitsu Client Computing Limited. 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 E4:46:B0:00:00:00 to E4:46:B0:FF:FF:FF.

OUI prefix: E4:46:B0
Hyphen form: E4-46-B0
MAC range: E4:46:B0:00:00:00 – E4:46:B0:FF:FF:FF
Addresses in block: 16,777,216
Organization: Fujitsu Client Computing Limited
Address: 1-1-2 Kashimada, Saiwai-ku Kawasaki Kanagawa JP 212-0058
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.

2021-06-10Assigned to "Fujitsu Client Computing Limited"
archived source →
2026-07-17Assigned to "Fujitsu Client Computing Limited"

Nearby in the registry

The prefixes assigned immediately before and after E4:46:B0:

FAQ

Which company owns MAC address prefix E4:46:B0?: MAC address prefix E4:46:B0 is registered to Fujitsu Client Computing Limited in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with E4:46:B0 has a network interface built by Fujitsu Client Computing Limited.
What is the OUI E4:46:B0?: E4:46:B0 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Fujitsu Client Computing Limited. It covers every address from E4:46:B0:00:00:00 to E4:46:B0:FF:FF:FF, or 16,777,216 addresses in total. It is also written E4-46-B0.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in E4:46:B0:00:00:00 that is E4:46:B0 — 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 Fujitsu Client Computing Limited located?: Fujitsu Client Computing Limited is listed at 1-1-2 Kashimada, Saiwai-ku Kawasaki Kanagawa JP 212-0058 in the IEEE OUI registry entry for E4:46:B0. This is the address the organization registered with the IEEE, which may differ from its current operating address.