Which company owns MAC address prefix D0:C4:2F?

MAC address prefix D0:C4:2F is registered to Tamagawa Seiki Co.,Ltd. in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with D0:C4:2F has a network interface built by Tamagawa Seiki Co.,Ltd..

What is the OUI D0:C4:2F?

D0:C4:2F is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Tamagawa Seiki Co.,Ltd.. It covers every address from D0:C4:2F:00:00:00 to D0:C4:2F:FF:FF:FF, or 16,777,216 addresses in total. It is also written D0-C4-2F.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in D0:C4:2F:00:00:00 that is D0:C4:2F — 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 Tamagawa Seiki Co.,Ltd. located?

Tamagawa Seiki Co.,Ltd. is listed at 1-3-47 Kitainter Kogyodanchi Hachinohe city Aomori-Pref. US 039-2245 in the IEEE OUI registry entry for D0:C4:2F. This is the address the organization registered with the IEEE, which may differ from its current operating address.

Tamagawa Seiki Co.,Ltd.

MAC address prefix D0:C4:2F is registered to Tamagawa Seiki Co.,Ltd. in the IEEE OUI registry. Any device whose MAC address begins with D0:C4:2F has a network interface built by Tamagawa Seiki 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 D0:C4:2F:00:00:00 to D0:C4:2F:FF:FF:FF.

OUI prefix: D0:C4:2F
Hyphen form: D0-C4-2F
MAC range: D0:C4:2F:00:00:00 – D0:C4:2F:FF:FF:FF
Addresses in block: 16,777,216
Organization: Tamagawa Seiki Co.,Ltd.
Address: 1-3-47 Kitainter Kogyodanchi Hachinohe city Aomori-Pref. US 039-2245
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 "Tamagawa Seiki Co.,Ltd."
archived source →
2026-07-17Assigned to "Tamagawa Seiki Co.,Ltd."

Nearby in the registry

The prefixes assigned immediately before and after D0:C4:2F:

FAQ

Which company owns MAC address prefix D0:C4:2F?: MAC address prefix D0:C4:2F is registered to Tamagawa Seiki Co.,Ltd. in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with D0:C4:2F has a network interface built by Tamagawa Seiki Co.,Ltd..
What is the OUI D0:C4:2F?: D0:C4:2F is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Tamagawa Seiki Co.,Ltd.. It covers every address from D0:C4:2F:00:00:00 to D0:C4:2F:FF:FF:FF, or 16,777,216 addresses in total. It is also written D0-C4-2F.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in D0:C4:2F:00:00:00 that is D0:C4:2F — 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 Tamagawa Seiki Co.,Ltd. located?: Tamagawa Seiki Co.,Ltd. is listed at 1-3-47 Kitainter Kogyodanchi Hachinohe city Aomori-Pref. US 039-2245 in the IEEE OUI registry entry for D0:C4:2F. This is the address the organization registered with the IEEE, which may differ from its current operating address.