Which company owns MAC address prefix 64:7D:81?

MAC address prefix 64:7D:81 is registered to YOKOTA INDUSTRIAL CO,.LTD in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 64:7D:81 has a network interface built by YOKOTA INDUSTRIAL CO,.LTD.

What is the OUI 64:7D:81?

64:7D:81 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to YOKOTA INDUSTRIAL CO,.LTD. It covers every address from 64:7D:81:00:00:00 to 64:7D:81:FF:FF:FF, or 16,777,216 addresses in total. It is also written 64-7D-81.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in 64:7D:81:00:00:00 that is 64:7D:81 — 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 YOKOTA INDUSTRIAL CO,.LTD located?

YOKOTA INDUSTRIAL CO,.LTD is listed at 5-55 NISHIIWATA HIGASHI OSAKA-CITY OSAKA JP 578-0947 in the IEEE OUI registry entry for 64:7D:81. This is the address the organization registered with the IEEE, which may differ from its current operating address.

YOKOTA INDUSTRIAL CO,.LTD

MAC address prefix 64:7D:81 is registered to YOKOTA INDUSTRIAL CO,.LTD in the IEEE OUI registry. Any device whose MAC address begins with 64:7D:81 has a network interface built by YOKOTA INDUSTRIAL 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 64:7D:81:00:00:00 to 64:7D:81:FF:FF:FF.

OUI prefix: 64:7D:81
Hyphen form: 64-7D-81
MAC range: 64:7D:81:00:00:00 – 64:7D:81:FF:FF:FF
Addresses in block: 16,777,216
Organization: YOKOTA INDUSTRIAL CO,.LTD
Address: 5-55 NISHIIWATA HIGASHI OSAKA-CITY OSAKA JP 578-0947
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 "YOKOTA INDUSTRIAL CO,.LTD"
archived source →
2026-07-17Assigned to "YOKOTA INDUSTRIAL CO,.LTD"

Nearby in the registry

The prefixes assigned immediately before and after 64:7D:81:

FAQ

Which company owns MAC address prefix 64:7D:81?: MAC address prefix 64:7D:81 is registered to YOKOTA INDUSTRIAL CO,.LTD in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 64:7D:81 has a network interface built by YOKOTA INDUSTRIAL CO,.LTD.
What is the OUI 64:7D:81?: 64:7D:81 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to YOKOTA INDUSTRIAL CO,.LTD. It covers every address from 64:7D:81:00:00:00 to 64:7D:81:FF:FF:FF, or 16,777,216 addresses in total. It is also written 64-7D-81.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in 64:7D:81:00:00:00 that is 64:7D:81 — 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 YOKOTA INDUSTRIAL CO,.LTD located?: YOKOTA INDUSTRIAL CO,.LTD is listed at 5-55 NISHIIWATA HIGASHI OSAKA-CITY OSAKA JP 578-0947 in the IEEE OUI registry entry for 64:7D:81. This is the address the organization registered with the IEEE, which may differ from its current operating address.