Which company owns MAC address prefix D4:1F:0C?

MAC address prefix D4:1F:0C is registered to JAI Manufacturing in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with D4:1F:0C has a network interface built by JAI Manufacturing.

What is the OUI D4:1F:0C?

D4:1F:0C is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to JAI Manufacturing. It covers every address from D4:1F:0C:00:00:00 to D4:1F:0C:FF:FF:FF, or 16,777,216 addresses in total. It is also written D4-1F-0C.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in D4:1F:0C:00:00:00 that is D4:1F:0C — 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 JAI Manufacturing located?

JAI Manufacturing is listed at 2960-14 Uenojo Nishikata Kushima Miyazaki JP 888-0004 in the IEEE OUI registry entry for D4:1F:0C. This is the address the organization registered with the IEEE, which may differ from its current operating address.

How many MAC prefixes does JAI Manufacturing own?

JAI Manufacturing holds 2 OUI prefixes in the IEEE registry, of which D4:1F:0C is one. A device made by JAI Manufacturing could carry a MAC address from any of them.

JAI Manufacturing

MAC address prefix D4:1F:0C is registered to JAI Manufacturing in the IEEE OUI registry. Any device whose MAC address begins with D4:1F:0C has a network interface built by JAI Manufacturing. 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 D4:1F:0C:00:00:00 to D4:1F:0C:FF:FF:FF.

OUI prefix: D4:1F:0C
Hyphen form: D4-1F-0C
MAC range: D4:1F:0C:00:00:00 – D4:1F:0C:FF:FF:FF
Addresses in block: 16,777,216
Organization: JAI Manufacturing
Address: 2960-14 Uenojo Nishikata Kushima Miyazaki JP 888-0004
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 JAI Manufacturing

JAI Manufacturing holds 2 OUI prefixes in total. A device with this exact prefix could just as well carry any of these:

00:0C:DF

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 "JAI Oy"
archived source →
2020-03-21Renamed from "JAI Oy" to "JAI Manufacturing"
archived source →
2026-07-17Assigned to "JAI Manufacturing"

Nearby in the registry

The prefixes assigned immediately before and after D4:1F:0C:

FAQ

Which company owns MAC address prefix D4:1F:0C?: MAC address prefix D4:1F:0C is registered to JAI Manufacturing in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with D4:1F:0C has a network interface built by JAI Manufacturing.
What is the OUI D4:1F:0C?: D4:1F:0C is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to JAI Manufacturing. It covers every address from D4:1F:0C:00:00:00 to D4:1F:0C:FF:FF:FF, or 16,777,216 addresses in total. It is also written D4-1F-0C.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in D4:1F:0C:00:00:00 that is D4:1F:0C — 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 JAI Manufacturing located?: JAI Manufacturing is listed at 2960-14 Uenojo Nishikata Kushima Miyazaki JP 888-0004 in the IEEE OUI registry entry for D4:1F:0C. This is the address the organization registered with the IEEE, which may differ from its current operating address.
How many MAC prefixes does JAI Manufacturing own?: JAI Manufacturing holds 2 OUI prefixes in the IEEE registry, of which D4:1F:0C is one. A device made by JAI Manufacturing could carry a MAC address from any of them.