Which company owns MAC address prefix 00:C0:6F?

MAC address prefix 00:C0:6F is registered to KOMATSU LTD. in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 00:C0:6F has a network interface built by KOMATSU LTD..

What is the OUI 00:C0:6F?

00:C0:6F is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to KOMATSU LTD.. It covers every address from 00:C0:6F:00:00:00 to 00:C0:6F:FF:FF:FF, or 16,777,216 addresses in total. It is also written 00-C0-6F.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in 00:C0:6F:00:00:00 that is 00:C0:6F — 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 KOMATSU LTD. located?

KOMATSU LTD. is listed at 3-25-1, Shinomiya Hiratsuka-Shi Kanagawa-Ken JP 254-8555 in the IEEE OUI registry entry for 00:C0:6F. This is the address the organization registered with the IEEE, which may differ from its current operating address.

How many MAC prefixes does KOMATSU LTD. own?

KOMATSU LTD. holds 2 OUI prefixes in the IEEE registry, of which 00:C0:6F is one. A device made by KOMATSU LTD. could carry a MAC address from any of them.

KOMATSU LTD.

MAC address prefix 00:C0:6F is registered to KOMATSU LTD. in the IEEE OUI registry. Any device whose MAC address begins with 00:C0:6F has a network interface built by KOMATSU 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 00:C0:6F:00:00:00 to 00:C0:6F:FF:FF:FF.

OUI prefix: 00:C0:6F
Hyphen form: 00-C0-6F
MAC range: 00:C0:6F:00:00:00 – 00:C0:6F:FF:FF:FF
Addresses in block: 16,777,216
Organization: KOMATSU LTD.
Address: 3-25-1, Shinomiya Hiratsuka-Shi Kanagawa-Ken JP 254-8555
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.

Other prefixes from KOMATSU LTD.

KOMATSU LTD. holds 2 OUI prefixes in total. A device with this exact prefix could just as well carry any of these:

CC:3F:8A

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 "KOMATSU LTD."
archived source →
2026-07-17Assigned to "KOMATSU LTD."

Nearby in the registry

The prefixes assigned immediately before and after 00:C0:6F:

FAQ

Which company owns MAC address prefix 00:C0:6F?: MAC address prefix 00:C0:6F is registered to KOMATSU LTD. in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 00:C0:6F has a network interface built by KOMATSU LTD..
What is the OUI 00:C0:6F?: 00:C0:6F is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to KOMATSU LTD.. It covers every address from 00:C0:6F:00:00:00 to 00:C0:6F:FF:FF:FF, or 16,777,216 addresses in total. It is also written 00-C0-6F.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in 00:C0:6F:00:00:00 that is 00:C0:6F — 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 KOMATSU LTD. located?: KOMATSU LTD. is listed at 3-25-1, Shinomiya Hiratsuka-Shi Kanagawa-Ken JP 254-8555 in the IEEE OUI registry entry for 00:C0:6F. This is the address the organization registered with the IEEE, which may differ from its current operating address.
How many MAC prefixes does KOMATSU LTD. own?: KOMATSU LTD. holds 2 OUI prefixes in the IEEE registry, of which 00:C0:6F is one. A device made by KOMATSU LTD. could carry a MAC address from any of them.