Which company owns MAC address prefix 0C:01:C8?

MAC address prefix 0C:01:C8 is registered to DENSO Co.,Ltd in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 0C:01:C8 has a network interface built by DENSO Co.,Ltd.

What is the OUI 0C:01:C8?

0C:01:C8 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to DENSO Co.,Ltd. It covers every address from 0C:01:C8:00:00:00 to 0C:01:C8:FF:FF:FF, or 16,777,216 addresses in total. It is also written 0C-01-C8.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in 0C:01:C8:00:00:00 that is 0C:01:C8 — 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 DENSO Co.,Ltd located?

DENSO Co.,Ltd is listed at Twin21 MIDTower(24th floor),2-1-61 Shiromi,Chuo-ku,Osaka-shi Osaka JP 540-6124 in the IEEE OUI registry entry for 0C:01:C8. This is the address the organization registered with the IEEE, which may differ from its current operating address.

DENSO Co.,Ltd

MAC address prefix 0C:01:C8 is registered to DENSO Co.,Ltd in the IEEE OUI registry. Any device whose MAC address begins with 0C:01:C8 has a network interface built by DENSO 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 0C:01:C8:00:00:00 to 0C:01:C8:FF:FF:FF.

OUI prefix: 0C:01:C8
Hyphen form: 0C-01-C8
MAC range: 0C:01:C8:00:00:00 – 0C:01:C8:FF:FF:FF
Addresses in block: 16,777,216
Organization: DENSO Co.,Ltd
Address: Twin21 MIDTower(24th floor),2-1-61 Shiromi,Chuo-ku,Osaka-shi Osaka JP 540-6124
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 (1)

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

2026-07-17Assigned to "DENSO Co.,Ltd"

Nearby in the registry

The prefixes assigned immediately before and after 0C:01:C8:

FAQ

Which company owns MAC address prefix 0C:01:C8?: MAC address prefix 0C:01:C8 is registered to DENSO Co.,Ltd in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 0C:01:C8 has a network interface built by DENSO Co.,Ltd.
What is the OUI 0C:01:C8?: 0C:01:C8 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to DENSO Co.,Ltd. It covers every address from 0C:01:C8:00:00:00 to 0C:01:C8:FF:FF:FF, or 16,777,216 addresses in total. It is also written 0C-01-C8.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in 0C:01:C8:00:00:00 that is 0C:01:C8 — 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 DENSO Co.,Ltd located?: DENSO Co.,Ltd is listed at Twin21 MIDTower(24th floor),2-1-61 Shiromi,Chuo-ku,Osaka-shi Osaka JP 540-6124 in the IEEE OUI registry entry for 0C:01:C8. This is the address the organization registered with the IEEE, which may differ from its current operating address.