Which company owns MAC address prefix AC:44:F2?

MAC address prefix AC:44:F2 is registered to YAMAHA CORPORATION in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with AC:44:F2 has a network interface built by YAMAHA CORPORATION.

What is the OUI AC:44:F2?

AC:44:F2 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to YAMAHA CORPORATION. It covers every address from AC:44:F2:00:00:00 to AC:44:F2:FF:FF:FF, or 16,777,216 addresses in total. It is also written AC-44-F2.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in AC:44:F2:00:00:00 that is AC:44:F2 — 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 YAMAHA CORPORATION located?

YAMAHA CORPORATION is listed at 10-1 Nakazawa-cho, Naka-ku Hamamatsu Shizuoka JP 430-8650 in the IEEE OUI registry entry for AC:44:F2. This is the address the organization registered with the IEEE, which may differ from its current operating address.

How many MAC prefixes does YAMAHA CORPORATION own?

YAMAHA CORPORATION holds 3 OUI prefixes in the IEEE registry, of which AC:44:F2 is one. A device made by YAMAHA CORPORATION could carry a MAC address from any of them.

YAMAHA CORPORATION

MAC address prefix AC:44:F2 is registered to YAMAHA CORPORATION in the IEEE OUI registry. Any device whose MAC address begins with AC:44:F2 has a network interface built by YAMAHA 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 AC:44:F2:00:00:00 to AC:44:F2:FF:FF:FF.

OUI prefix: AC:44:F2
Hyphen form: AC-44-F2
MAC range: AC:44:F2:00:00:00 – AC:44:F2:FF:FF:FF
Addresses in block: 16,777,216
Organization: YAMAHA CORPORATION
Address: 10-1 Nakazawa-cho, Naka-ku Hamamatsu Shizuoka JP 430-8650
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 YAMAHA CORPORATION

YAMAHA CORPORATION holds 3 OUI prefixes in total. A device with this exact prefix could just as well carry any of these:

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 "YAMAHA CORPORATION"
archived source →
2026-07-17Assigned to "YAMAHA CORPORATION"

Nearby in the registry

The prefixes assigned immediately before and after AC:44:F2:

FAQ

Which company owns MAC address prefix AC:44:F2?: MAC address prefix AC:44:F2 is registered to YAMAHA CORPORATION in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with AC:44:F2 has a network interface built by YAMAHA CORPORATION.
What is the OUI AC:44:F2?: AC:44:F2 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to YAMAHA CORPORATION. It covers every address from AC:44:F2:00:00:00 to AC:44:F2:FF:FF:FF, or 16,777,216 addresses in total. It is also written AC-44-F2.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in AC:44:F2:00:00:00 that is AC:44:F2 — 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 YAMAHA CORPORATION located?: YAMAHA CORPORATION is listed at 10-1 Nakazawa-cho, Naka-ku Hamamatsu Shizuoka JP 430-8650 in the IEEE OUI registry entry for AC:44:F2. This is the address the organization registered with the IEEE, which may differ from its current operating address.
How many MAC prefixes does YAMAHA CORPORATION own?: YAMAHA CORPORATION holds 3 OUI prefixes in the IEEE registry, of which AC:44:F2 is one. A device made by YAMAHA CORPORATION could carry a MAC address from any of them.