Which company owns MAC address prefix E0:D1:0A?

MAC address prefix E0:D1:0A is registered to Katoudenkikougyousyo co ltd in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with E0:D1:0A has a network interface built by Katoudenkikougyousyo co ltd.

What is the OUI E0:D1:0A?

E0:D1:0A is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Katoudenkikougyousyo co ltd. It covers every address from E0:D1:0A:00:00:00 to E0:D1:0A:FF:FF:FF, or 16,777,216 addresses in total. It is also written E0-D1-0A.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in E0:D1:0A:00:00:00 that is E0:D1:0A — 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 Katoudenkikougyousyo co ltd located?

Katoudenkikougyousyo co ltd is listed at oujihontyou1-4-13 kita-ku tokyo-to JP 114-0022 in the IEEE OUI registry entry for E0:D1:0A. This is the address the organization registered with the IEEE, which may differ from its current operating address.

Katoudenkikougyousyo co ltd

MAC address prefix E0:D1:0A is registered to Katoudenkikougyousyo co ltd in the IEEE OUI registry. Any device whose MAC address begins with E0:D1:0A has a network interface built by Katoudenkikougyousyo 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 E0:D1:0A:00:00:00 to E0:D1:0A:FF:FF:FF.

OUI prefix: E0:D1:0A
Hyphen form: E0-D1-0A
MAC range: E0:D1:0A:00:00:00 – E0:D1:0A:FF:FF:FF
Addresses in block: 16,777,216
Organization: Katoudenkikougyousyo co ltd
Address: oujihontyou1-4-13 kita-ku tokyo-to JP 114-0022
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 "Katoudenkikougyousyo co ltd"
archived source →
2026-07-17Assigned to "Katoudenkikougyousyo co ltd"

Nearby in the registry

The prefixes assigned immediately before and after E0:D1:0A:

FAQ

Which company owns MAC address prefix E0:D1:0A?: MAC address prefix E0:D1:0A is registered to Katoudenkikougyousyo co ltd in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with E0:D1:0A has a network interface built by Katoudenkikougyousyo co ltd.
What is the OUI E0:D1:0A?: E0:D1:0A is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Katoudenkikougyousyo co ltd. It covers every address from E0:D1:0A:00:00:00 to E0:D1:0A:FF:FF:FF, or 16,777,216 addresses in total. It is also written E0-D1-0A.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in E0:D1:0A:00:00:00 that is E0:D1:0A — 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 Katoudenkikougyousyo co ltd located?: Katoudenkikougyousyo co ltd is listed at oujihontyou1-4-13 kita-ku tokyo-to JP 114-0022 in the IEEE OUI registry entry for E0:D1:0A. This is the address the organization registered with the IEEE, which may differ from its current operating address.