Which company owns MAC address prefix 00:D0:EC?

MAC address prefix 00:D0:EC is registered to NAKAYO Inc in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 00:D0:EC has a network interface built by NAKAYO Inc.

What is the OUI 00:D0:EC?

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

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in 00:D0:EC:00:00:00 that is 00:D0:EC — 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 NAKAYO Inc located?

NAKAYO Inc is listed at Development Support Center 165 Higashiomuro-machi Maebashi-shi Gunma JP 379-2105 in the IEEE OUI registry entry for 00:D0:EC. This is the address the organization registered with the IEEE, which may differ from its current operating address.

How many MAC prefixes does NAKAYO Inc own?

NAKAYO Inc holds 6 OUI prefixes in the IEEE registry, of which 00:D0:EC is one. A device made by NAKAYO Inc could carry a MAC address from any of them.

NAKAYO Inc

MAC address prefix 00:D0:EC is registered to NAKAYO Inc in the IEEE OUI registry. Any device whose MAC address begins with 00:D0:EC has a network interface built by NAKAYO Inc. 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:D0:EC:00:00:00 to 00:D0:EC:FF:FF:FF.

OUI prefix: 00:D0:EC
Hyphen form: 00-D0-EC
MAC range: 00:D0:EC:00:00:00 – 00:D0:EC:FF:FF:FF
Addresses in block: 16,777,216
Organization: NAKAYO Inc
Address: Development Support Center 165 Higashiomuro-machi Maebashi-shi Gunma JP 379-2105
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 NAKAYO Inc

NAKAYO Inc holds 6 OUI prefixes in total. A device with this exact prefix could just as well carry any of these:

Assignment history (3)

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 "NAKAYO TELECOMMUNICATIONS,INC"
archived source →
2017-09-08Renamed from "NAKAYO TELECOMMUNICATIONS,INC" to "NAKAYO Inc"
archived source →
2026-07-17Assigned to "NAKAYO Inc"

Nearby in the registry

The prefixes assigned immediately before and after 00:D0:EC:

FAQ

Which company owns MAC address prefix 00:D0:EC?: MAC address prefix 00:D0:EC is registered to NAKAYO Inc in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 00:D0:EC has a network interface built by NAKAYO Inc.
What is the OUI 00:D0:EC?: 00:D0:EC is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to NAKAYO Inc. It covers every address from 00:D0:EC:00:00:00 to 00:D0:EC:FF:FF:FF, or 16,777,216 addresses in total. It is also written 00-D0-EC.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in 00:D0:EC:00:00:00 that is 00:D0:EC — 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 NAKAYO Inc located?: NAKAYO Inc is listed at Development Support Center 165 Higashiomuro-machi Maebashi-shi Gunma JP 379-2105 in the IEEE OUI registry entry for 00:D0:EC. This is the address the organization registered with the IEEE, which may differ from its current operating address.
How many MAC prefixes does NAKAYO Inc own?: NAKAYO Inc holds 6 OUI prefixes in the IEEE registry, of which 00:D0:EC is one. A device made by NAKAYO Inc could carry a MAC address from any of them.