Which company owns MAC address prefix AC:C6:98?

MAC address prefix AC:C6:98 is registered to Kohzu Precision Co., Ltd. in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with AC:C6:98 has a network interface built by Kohzu Precision Co., Ltd..

What is the OUI AC:C6:98?

AC:C6:98 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Kohzu Precision Co., Ltd.. It covers every address from AC:C6:98:00:00:00 to AC:C6:98:FF:FF:FF, or 16,777,216 addresses in total. It is also written AC-C6-98.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in AC:C6:98:00:00:00 that is AC:C6:98 — 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 Kohzu Precision Co., Ltd. located?

Kohzu Precision Co., Ltd. is listed at 2-6-15, Kurigi, Asao-ku Kawasaki-shi Kanagawa JP 215-8521 in the IEEE OUI registry entry for AC:C6:98. This is the address the organization registered with the IEEE, which may differ from its current operating address.

Kohzu Precision Co., Ltd.

MAC address prefix AC:C6:98 is registered to Kohzu Precision Co., Ltd. in the IEEE OUI registry. Any device whose MAC address begins with AC:C6:98 has a network interface built by Kohzu Precision Co., Ltd.. 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 AC:C6:98:00:00:00 to AC:C6:98:FF:FF:FF.

OUI prefix: AC:C6:98
Hyphen form: AC-C6-98
MAC range: AC:C6:98:00:00:00 – AC:C6:98:FF:FF:FF
Addresses in block: 16,777,216
Organization: Kohzu Precision Co., Ltd.
Address: 2-6-15, Kurigi, Asao-ku Kawasaki-shi Kanagawa JP 215-8521
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 "Kohzu Precision Co., Ltd."
archived source →
2026-07-17Assigned to "Kohzu Precision Co., Ltd."

Nearby in the registry

The prefixes assigned immediately before and after AC:C6:98:

FAQ

Which company owns MAC address prefix AC:C6:98?: MAC address prefix AC:C6:98 is registered to Kohzu Precision Co., Ltd. in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with AC:C6:98 has a network interface built by Kohzu Precision Co., Ltd..
What is the OUI AC:C6:98?: AC:C6:98 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Kohzu Precision Co., Ltd.. It covers every address from AC:C6:98:00:00:00 to AC:C6:98:FF:FF:FF, or 16,777,216 addresses in total. It is also written AC-C6-98.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in AC:C6:98:00:00:00 that is AC:C6:98 — 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 Kohzu Precision Co., Ltd. located?: Kohzu Precision Co., Ltd. is listed at 2-6-15, Kurigi, Asao-ku Kawasaki-shi Kanagawa JP 215-8521 in the IEEE OUI registry entry for AC:C6:98. This is the address the organization registered with the IEEE, which may differ from its current operating address.