Which company owns MAC address prefix DC:05:ED?

MAC address prefix DC:05:ED is registered to Nabtesco Corporation in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with DC:05:ED has a network interface built by Nabtesco Corporation.

What is the OUI DC:05:ED?

DC:05:ED is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Nabtesco Corporation. It covers every address from DC:05:ED:00:00:00 to DC:05:ED:FF:FF:FF, or 16,777,216 addresses in total. It is also written DC-05-ED.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in DC:05:ED:00:00:00 that is DC:05:ED — 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 Nabtesco Corporation located?

Nabtesco Corporation is listed at 9-18, Kaigan 1-chome Minato-ku Tokyo JP 105-0022 in the IEEE OUI registry entry for DC:05:ED. This is the address the organization registered with the IEEE, which may differ from its current operating address.

Nabtesco Corporation

MAC address prefix DC:05:ED is registered to Nabtesco Corporation in the IEEE OUI registry. Any device whose MAC address begins with DC:05:ED has a network interface built by Nabtesco 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 DC:05:ED:00:00:00 to DC:05:ED:FF:FF:FF.

OUI prefix: DC:05:ED
Hyphen form: DC-05-ED
MAC range: DC:05:ED:00:00:00 – DC:05:ED:FF:FF:FF
Addresses in block: 16,777,216
Organization: Nabtesco Corporation
Address: 9-18, Kaigan 1-chome Minato-ku Tokyo JP 105-0022
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 "Nabtesco Corporation"
archived source →
2026-07-17Assigned to "Nabtesco Corporation"

Nearby in the registry

The prefixes assigned immediately before and after DC:05:ED:

FAQ

Which company owns MAC address prefix DC:05:ED?: MAC address prefix DC:05:ED is registered to Nabtesco Corporation in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with DC:05:ED has a network interface built by Nabtesco Corporation.
What is the OUI DC:05:ED?: DC:05:ED is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Nabtesco Corporation. It covers every address from DC:05:ED:00:00:00 to DC:05:ED:FF:FF:FF, or 16,777,216 addresses in total. It is also written DC-05-ED.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in DC:05:ED:00:00:00 that is DC:05:ED — 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 Nabtesco Corporation located?: Nabtesco Corporation is listed at 9-18, Kaigan 1-chome Minato-ku Tokyo JP 105-0022 in the IEEE OUI registry entry for DC:05:ED. This is the address the organization registered with the IEEE, which may differ from its current operating address.