Which company owns MAC address prefix E4:EE:FD?

MAC address prefix E4:EE:FD is registered to MR&D Manufacturing in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with E4:EE:FD has a network interface built by MR&D Manufacturing.

What is the OUI E4:EE:FD?

E4:EE:FD is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to MR&D Manufacturing. It covers every address from E4:EE:FD:00:00:00 to E4:EE:FD:FF:FF:FF, or 16,777,216 addresses in total. It is also written E4-EE-FD.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in E4:EE:FD:00:00:00 that is E4:EE:FD — 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 MR&D Manufacturing located?

MR&D Manufacturing is listed at Viale dell'Unione Europea, 8 Gallarate Varese US 21013 in the IEEE OUI registry entry for E4:EE:FD. This is the address the organization registered with the IEEE, which may differ from its current operating address.

MR&D Manufacturing

MAC address prefix E4:EE:FD is registered to MR&D Manufacturing in the IEEE OUI registry. Any device whose MAC address begins with E4:EE:FD has a network interface built by MR&D 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 E4:EE:FD:00:00:00 to E4:EE:FD:FF:FF:FF.

OUI prefix: E4:EE:FD
Hyphen form: E4-EE-FD
MAC range: E4:EE:FD:00:00:00 – E4:EE:FD:FF:FF:FF
Addresses in block: 16,777,216
Organization: MR&D Manufacturing
Address: Viale dell'Unione Europea, 8 Gallarate Varese US 21013
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 "MR&D Manufacturing"
archived source →
2026-07-17Assigned to "MR&D Manufacturing"

Nearby in the registry

The prefixes assigned immediately before and after E4:EE:FD:

FAQ

Which company owns MAC address prefix E4:EE:FD?: MAC address prefix E4:EE:FD is registered to MR&D Manufacturing in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with E4:EE:FD has a network interface built by MR&D Manufacturing.
What is the OUI E4:EE:FD?: E4:EE:FD is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to MR&D Manufacturing. It covers every address from E4:EE:FD:00:00:00 to E4:EE:FD:FF:FF:FF, or 16,777,216 addresses in total. It is also written E4-EE-FD.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in E4:EE:FD:00:00:00 that is E4:EE:FD — 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 MR&D Manufacturing located?: MR&D Manufacturing is listed at Viale dell'Unione Europea, 8 Gallarate Varese US 21013 in the IEEE OUI registry entry for E4:EE:FD. This is the address the organization registered with the IEEE, which may differ from its current operating address.