Which company owns MAC address prefix FC:4B:57?

MAC address prefix FC:4B:57 is registered to Peerless Instrument Division of Curtiss-Wright in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with FC:4B:57 has a network interface built by Peerless Instrument Division of Curtiss-Wright.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in FC:4B:57:00:00:00 that is FC:4B:57 — 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.

Peerless Instrument Division of Curtiss-Wright

MAC address prefix FC:4B:57 is registered to Peerless Instrument Division of Curtiss-Wright in the IEEE OUI registry. Any device whose MAC address begins with FC:4B:57 has a network interface built by Peerless Instrument Division of Curtiss-Wright. 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 FC:4B:57:00:00:00 to FC:4B:57:FF:FF:FF.

OUI prefix: FC:4B:57
Hyphen form: FC-4B-57
MAC range: FC:4B:57:00:00:00 – FC:4B:57:FF:FF:FF
Addresses in block: 16,777,216
Organization: Peerless Instrument Division of Curtiss-Wright
Address: 1966D Broadhollow Road East Farmingdale NY US 11735
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.

2020-11-28Assigned to "Peerless Instrument Division of Curtiss-Wright"
archived source →
2026-07-17Assigned to "Peerless Instrument Division of Curtiss-Wright"

Nearby in the registry

The prefixes assigned immediately before and after FC:4B:57:

FAQ

Which company owns MAC address prefix FC:4B:57?: MAC address prefix FC:4B:57 is registered to Peerless Instrument Division of Curtiss-Wright in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with FC:4B:57 has a network interface built by Peerless Instrument Division of Curtiss-Wright.
What is the OUI FC:4B:57?: FC:4B:57 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Peerless Instrument Division of Curtiss-Wright. It covers every address from FC:4B:57:00:00:00 to FC:4B:57:FF:FF:FF, or 16,777,216 addresses in total. It is also written FC-4B-57.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in FC:4B:57:00:00:00 that is FC:4B:57 — 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 Peerless Instrument Division of Curtiss-Wright located?: Peerless Instrument Division of Curtiss-Wright is listed at 1966D Broadhollow Road East Farmingdale NY US 11735 in the IEEE OUI registry entry for FC:4B:57. This is the address the organization registered with the IEEE, which may differ from its current operating address.