Which company owns MAC address prefix 00:04:25?

MAC address prefix 00:04:25 is registered to Atmel Corporation in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 00:04:25 has a network interface built by Atmel Corporation.

What is the OUI 00:04:25?

00:04:25 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Atmel Corporation. It covers every address from 00:04:25:00:00:00 to 00:04:25:FF:FF:FF, or 16,777,216 addresses in total. It is also written 00-04-25.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in 00:04:25:00:00:00 that is 00:04:25 — 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 Atmel Corporation located?

Atmel Corporation is listed at Multimedia & Communications Group Morrisville NC US 27560 in the IEEE OUI registry entry for 00:04:25. This is the address the organization registered with the IEEE, which may differ from its current operating address.

How many MAC prefixes does Atmel Corporation own?

Atmel Corporation holds 2 OUI prefixes in the IEEE registry, of which 00:04:25 is one. A device made by Atmel Corporation could carry a MAC address from any of them.

Atmel Corporation

MAC address prefix 00:04:25 is registered to Atmel Corporation in the IEEE OUI registry. Any device whose MAC address begins with 00:04:25 has a network interface built by Atmel 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 00:04:25:00:00:00 to 00:04:25:FF:FF:FF.

OUI prefix: 00:04:25
Hyphen form: 00-04-25
MAC range: 00:04:25:00:00:00 – 00:04:25:FF:FF:FF
Addresses in block: 16,777,216
Organization: Atmel Corporation
Address: Multimedia & Communications Group Morrisville NC US 27560
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 Atmel Corporation

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

FC:C2:3D

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 "Atmel Corporation"
archived source →
2026-07-17Assigned to "Atmel Corporation"

Nearby in the registry

The prefixes assigned immediately before and after 00:04:25:

FAQ

Which company owns MAC address prefix 00:04:25?: MAC address prefix 00:04:25 is registered to Atmel Corporation in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 00:04:25 has a network interface built by Atmel Corporation.
What is the OUI 00:04:25?: 00:04:25 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Atmel Corporation. It covers every address from 00:04:25:00:00:00 to 00:04:25:FF:FF:FF, or 16,777,216 addresses in total. It is also written 00-04-25.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in 00:04:25:00:00:00 that is 00:04:25 — 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 Atmel Corporation located?: Atmel Corporation is listed at Multimedia & Communications Group Morrisville NC US 27560 in the IEEE OUI registry entry for 00:04:25. This is the address the organization registered with the IEEE, which may differ from its current operating address.
How many MAC prefixes does Atmel Corporation own?: Atmel Corporation holds 2 OUI prefixes in the IEEE registry, of which 00:04:25 is one. A device made by Atmel Corporation could carry a MAC address from any of them.