Which company owns MAC address prefix 84:EA:D2?

MAC address prefix 84:EA:D2 is registered to KOGANEI CORPORATION in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 84:EA:D2 has a network interface built by KOGANEI CORPORATION.

What is the OUI 84:EA:D2?

84:EA:D2 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to KOGANEI CORPORATION. It covers every address from 84:EA:D2:00:00:00 to 84:EA:D2:FF:FF:FF, or 16,777,216 addresses in total. It is also written 84-EA-D2.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in 84:EA:D2:00:00:00 that is 84:EA:D2 — 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 KOGANEI CORPORATION located?

KOGANEI CORPORATION is listed at 3-11-28, Midori-cho Koganei-shi Tokyo JP 184-8533 in the IEEE OUI registry entry for 84:EA:D2. This is the address the organization registered with the IEEE, which may differ from its current operating address.

KOGANEI CORPORATION

MAC address prefix 84:EA:D2 is registered to KOGANEI CORPORATION in the IEEE OUI registry. Any device whose MAC address begins with 84:EA:D2 has a network interface built by KOGANEI CORPORATION. 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 84:EA:D2:00:00:00 to 84:EA:D2:FF:FF:FF.

OUI prefix: 84:EA:D2
Hyphen form: 84-EA-D2
MAC range: 84:EA:D2:00:00:00 – 84:EA:D2:FF:FF:FF
Addresses in block: 16,777,216
Organization: KOGANEI CORPORATION
Address: 3-11-28, Midori-cho Koganei-shi Tokyo JP 184-8533
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.

2025-02-27Assigned to "KOGANEI CORPORATION"
archived source →
2026-07-17Assigned to "KOGANEI CORPORATION"

Nearby in the registry

The prefixes assigned immediately before and after 84:EA:D2:

FAQ

Which company owns MAC address prefix 84:EA:D2?: MAC address prefix 84:EA:D2 is registered to KOGANEI CORPORATION in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 84:EA:D2 has a network interface built by KOGANEI CORPORATION.
What is the OUI 84:EA:D2?: 84:EA:D2 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to KOGANEI CORPORATION. It covers every address from 84:EA:D2:00:00:00 to 84:EA:D2:FF:FF:FF, or 16,777,216 addresses in total. It is also written 84-EA-D2.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in 84:EA:D2:00:00:00 that is 84:EA:D2 — 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 KOGANEI CORPORATION located?: KOGANEI CORPORATION is listed at 3-11-28, Midori-cho Koganei-shi Tokyo JP 184-8533 in the IEEE OUI registry entry for 84:EA:D2. This is the address the organization registered with the IEEE, which may differ from its current operating address.