Which company owns MAC address prefix E4:02:74?

MAC address prefix E4:02:74 is registered to FW Murphy Production Controls in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with E4:02:74 has a network interface built by FW Murphy Production Controls.

What is the OUI E4:02:74?

E4:02:74 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to FW Murphy Production Controls. It covers every address from E4:02:74:00:00:00 to E4:02:74:FF:FF:FF, or 16,777,216 addresses in total. It is also written E4-02-74.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in E4:02:74:00:00:00 that is E4:02:74 — 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 FW Murphy Production Controls located?

FW Murphy Production Controls is listed at 4646 S Harvard Ave Tulsa OK US 74135 in the IEEE OUI registry entry for E4:02:74. This is the address the organization registered with the IEEE, which may differ from its current operating address.

FW Murphy Production Controls

MAC address prefix E4:02:74 is registered to FW Murphy Production Controls in the IEEE OUI registry. Any device whose MAC address begins with E4:02:74 has a network interface built by FW Murphy Production Controls. 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 E4:02:74:00:00:00 to E4:02:74:FF:FF:FF.

OUI prefix: E4:02:74
Hyphen form: E4-02-74
MAC range: E4:02:74:00:00:00 – E4:02:74:FF:FF:FF
Addresses in block: 16,777,216
Organization: FW Murphy Production Controls
Address: 4646 S Harvard Ave Tulsa OK US 74135
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.

2026-06-20Assigned to "FW Murphy Production Controls"
archived source →
2026-07-17Assigned to "FW Murphy Production Controls"

Nearby in the registry

The prefixes assigned immediately before and after E4:02:74:

FAQ

Which company owns MAC address prefix E4:02:74?: MAC address prefix E4:02:74 is registered to FW Murphy Production Controls in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with E4:02:74 has a network interface built by FW Murphy Production Controls.
What is the OUI E4:02:74?: E4:02:74 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to FW Murphy Production Controls. It covers every address from E4:02:74:00:00:00 to E4:02:74:FF:FF:FF, or 16,777,216 addresses in total. It is also written E4-02-74.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in E4:02:74:00:00:00 that is E4:02:74 — 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 FW Murphy Production Controls located?: FW Murphy Production Controls is listed at 4646 S Harvard Ave Tulsa OK US 74135 in the IEEE OUI registry entry for E4:02:74. This is the address the organization registered with the IEEE, which may differ from its current operating address.