Which company owns MAC address prefix 00:20:FA?

MAC address prefix 00:20:FA is registered to GDE SYSTEMS, INC. in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 00:20:FA has a network interface built by GDE SYSTEMS, INC..

What is the OUI 00:20:FA?

00:20:FA is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to GDE SYSTEMS, INC.. It covers every address from 00:20:FA:00:00:00 to 00:20:FA:FF:FF:FF, or 16,777,216 addresses in total. It is also written 00-20-FA.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in 00:20:FA:00:00:00 that is 00:20:FA — 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 GDE SYSTEMS, INC. located?

GDE SYSTEMS, INC. is listed at P.O. BOX 85468 - BLDG.#61 SAN DIEGO CA US 92186-5468 in the IEEE OUI registry entry for 00:20:FA. This is the address the organization registered with the IEEE, which may differ from its current operating address.

GDE SYSTEMS, INC.

MAC address prefix 00:20:FA is registered to GDE SYSTEMS, INC. in the IEEE OUI registry. Any device whose MAC address begins with 00:20:FA has a network interface built by GDE SYSTEMS, INC.. 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 00:20:FA:00:00:00 to 00:20:FA:FF:FF:FF.

OUI prefix: 00:20:FA
Hyphen form: 00-20-FA
MAC range: 00:20:FA:00:00:00 – 00:20:FA:FF:FF:FF
Addresses in block: 16,777,216
Organization: GDE SYSTEMS, INC.
Address: P.O. BOX 85468 - BLDG.#61 SAN DIEGO CA US 92186-5468
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 "GDE SYSTEMS, INC."
archived source →
2026-07-17Assigned to "GDE SYSTEMS, INC."

Nearby in the registry

The prefixes assigned immediately before and after 00:20:FA:

FAQ

Which company owns MAC address prefix 00:20:FA?: MAC address prefix 00:20:FA is registered to GDE SYSTEMS, INC. in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 00:20:FA has a network interface built by GDE SYSTEMS, INC..
What is the OUI 00:20:FA?: 00:20:FA is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to GDE SYSTEMS, INC.. It covers every address from 00:20:FA:00:00:00 to 00:20:FA:FF:FF:FF, or 16,777,216 addresses in total. It is also written 00-20-FA.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in 00:20:FA:00:00:00 that is 00:20:FA — 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 GDE SYSTEMS, INC. located?: GDE SYSTEMS, INC. is listed at P.O. BOX 85468 - BLDG.#61 SAN DIEGO CA US 92186-5468 in the IEEE OUI registry entry for 00:20:FA. This is the address the organization registered with the IEEE, which may differ from its current operating address.