Which company owns MAC address prefix EC:47:3C?

MAC address prefix EC:47:3C is registered to Redwire, LLC in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with EC:47:3C has a network interface built by Redwire, LLC.

What is the OUI EC:47:3C?

EC:47:3C is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Redwire, LLC. It covers every address from EC:47:3C:00:00:00 to EC:47:3C:FF:FF:FF, or 16,777,216 addresses in total. It is also written EC-47-3C.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in EC:47:3C:00:00:00 that is EC:47:3C — 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 Redwire, LLC located?

Redwire, LLC is listed at 8 Thorndike St Everett MA US 02149 in the IEEE OUI registry entry for EC:47:3C. This is the address the organization registered with the IEEE, which may differ from its current operating address.

Redwire, LLC

MAC address prefix EC:47:3C is registered to Redwire, LLC in the IEEE OUI registry. Any device whose MAC address begins with EC:47:3C has a network interface built by Redwire, LLC. 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 EC:47:3C:00:00:00 to EC:47:3C:FF:FF:FF.

OUI prefix: EC:47:3C
Hyphen form: EC-47-3C
MAC range: EC:47:3C:00:00:00 – EC:47:3C:FF:FF:FF
Addresses in block: 16,777,216
Organization: Redwire, LLC
Address: 8 Thorndike St Everett MA US 02149
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 "Redwire, LLC"
archived source →
2026-07-17Assigned to "Redwire, LLC"

Nearby in the registry

The prefixes assigned immediately before and after EC:47:3C:

FAQ

Which company owns MAC address prefix EC:47:3C?: MAC address prefix EC:47:3C is registered to Redwire, LLC in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with EC:47:3C has a network interface built by Redwire, LLC.
What is the OUI EC:47:3C?: EC:47:3C is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Redwire, LLC. It covers every address from EC:47:3C:00:00:00 to EC:47:3C:FF:FF:FF, or 16,777,216 addresses in total. It is also written EC-47-3C.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in EC:47:3C:00:00:00 that is EC:47:3C — 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 Redwire, LLC located?: Redwire, LLC is listed at 8 Thorndike St Everett MA US 02149 in the IEEE OUI registry entry for EC:47:3C. This is the address the organization registered with the IEEE, which may differ from its current operating address.