Which company owns MAC address prefix F4:E9:D4?

MAC address prefix F4:E9:D4 is registered to QLogic Corporation in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with F4:E9:D4 has a network interface built by QLogic Corporation.

What is the OUI F4:E9:D4?

F4:E9:D4 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to QLogic Corporation. It covers every address from F4:E9:D4:00:00:00 to F4:E9:D4:FF:FF:FF, or 16,777,216 addresses in total. It is also written F4-E9-D4.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in F4:E9:D4:00:00:00 that is F4:E9:D4 — 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 QLogic Corporation located?

QLogic Corporation is listed at 26650 Aliso Viejo Parkway Aliso Viejo California US in the IEEE OUI registry entry for F4:E9:D4. This is the address the organization registered with the IEEE, which may differ from its current operating address.

How many MAC prefixes does QLogic Corporation own?

QLogic Corporation holds 6 OUI prefixes in the IEEE registry, of which F4:E9:D4 is one. A device made by QLogic Corporation could carry a MAC address from any of them.

QLogic Corporation

MAC address prefix F4:E9:D4 is registered to QLogic Corporation in the IEEE OUI registry. Any device whose MAC address begins with F4:E9:D4 has a network interface built by QLogic 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 F4:E9:D4:00:00:00 to F4:E9:D4:FF:FF:FF.

OUI prefix: F4:E9:D4
Hyphen form: F4-E9-D4
MAC range: F4:E9:D4:00:00:00 – F4:E9:D4:FF:FF:FF
Addresses in block: 16,777,216
Organization: QLogic Corporation
Address: 26650 Aliso Viejo Parkway Aliso Viejo California US
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 QLogic Corporation

QLogic Corporation holds 6 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 "QLogic Corporation"
archived source →
2026-07-17Assigned to "QLogic Corporation"

Nearby in the registry

The prefixes assigned immediately before and after F4:E9:D4:

FAQ

Which company owns MAC address prefix F4:E9:D4?: MAC address prefix F4:E9:D4 is registered to QLogic Corporation in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with F4:E9:D4 has a network interface built by QLogic Corporation.
What is the OUI F4:E9:D4?: F4:E9:D4 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to QLogic Corporation. It covers every address from F4:E9:D4:00:00:00 to F4:E9:D4:FF:FF:FF, or 16,777,216 addresses in total. It is also written F4-E9-D4.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in F4:E9:D4:00:00:00 that is F4:E9:D4 — 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 QLogic Corporation located?: QLogic Corporation is listed at 26650 Aliso Viejo Parkway Aliso Viejo California US in the IEEE OUI registry entry for F4:E9:D4. This is the address the organization registered with the IEEE, which may differ from its current operating address.
How many MAC prefixes does QLogic Corporation own?: QLogic Corporation holds 6 OUI prefixes in the IEEE registry, of which F4:E9:D4 is one. A device made by QLogic Corporation could carry a MAC address from any of them.