Which company owns MAC address prefix FC:ED:B9?

MAC address prefix FC:ED:B9 is registered to Arrayent in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with FC:ED:B9 has a network interface built by Arrayent.

What is the OUI FC:ED:B9?

FC:ED:B9 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Arrayent. It covers every address from FC:ED:B9:00:00:00 to FC:ED:B9:FF:FF:FF, or 16,777,216 addresses in total. It is also written FC-ED-B9.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in FC:ED:B9:00:00:00 that is FC:ED:B9 — 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 Arrayent located?

Arrayent is listed at 570 El Camino Real #150-419 Redwood City CA US 94063 in the IEEE OUI registry entry for FC:ED:B9. This is the address the organization registered with the IEEE, which may differ from its current operating address.

Arrayent

MAC address prefix FC:ED:B9 is registered to Arrayent in the IEEE OUI registry. Any device whose MAC address begins with FC:ED:B9 has a network interface built by Arrayent. 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:ED:B9:00:00:00 to FC:ED:B9:FF:FF:FF.

OUI prefix: FC:ED:B9
Hyphen form: FC-ED-B9
MAC range: FC:ED:B9:00:00:00 – FC:ED:B9:FF:FF:FF
Addresses in block: 16,777,216
Organization: Arrayent
Address: 570 El Camino Real #150-419 Redwood City CA US 94063
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 "Arrayent"
archived source →
2026-07-17Assigned to "Arrayent"

Nearby in the registry

The prefixes assigned immediately before and after FC:ED:B9:

FAQ

Which company owns MAC address prefix FC:ED:B9?: MAC address prefix FC:ED:B9 is registered to Arrayent in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with FC:ED:B9 has a network interface built by Arrayent.
What is the OUI FC:ED:B9?: FC:ED:B9 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Arrayent. It covers every address from FC:ED:B9:00:00:00 to FC:ED:B9:FF:FF:FF, or 16,777,216 addresses in total. It is also written FC-ED-B9.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in FC:ED:B9:00:00:00 that is FC:ED:B9 — 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 Arrayent located?: Arrayent is listed at 570 El Camino Real #150-419 Redwood City CA US 94063 in the IEEE OUI registry entry for FC:ED:B9. This is the address the organization registered with the IEEE, which may differ from its current operating address.