Which company owns MAC address prefix 04:CA:8D?

MAC address prefix 04:CA:8D is registered to Enfabrica in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 04:CA:8D has a network interface built by Enfabrica.

What is the OUI 04:CA:8D?

04:CA:8D is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Enfabrica. It covers every address from 04:CA:8D:00:00:00 to 04:CA:8D:FF:FF:FF, or 16,777,216 addresses in total. It is also written 04-CA-8D.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in 04:CA:8D:00:00:00 that is 04:CA:8D — 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 Enfabrica located?

Enfabrica is listed at 295 N Bernardo Ave #200 Mountain View CA US 94043 in the IEEE OUI registry entry for 04:CA:8D. This is the address the organization registered with the IEEE, which may differ from its current operating address.

Enfabrica

MAC address prefix 04:CA:8D is registered to Enfabrica in the IEEE OUI registry. Any device whose MAC address begins with 04:CA:8D has a network interface built by Enfabrica. 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 04:CA:8D:00:00:00 to 04:CA:8D:FF:FF:FF.

OUI prefix: 04:CA:8D
Hyphen form: 04-CA-8D
MAC range: 04:CA:8D:00:00:00 – 04:CA:8D:FF:FF:FF
Addresses in block: 16,777,216
Organization: Enfabrica
Address: 295 N Bernardo Ave #200 Mountain View CA US 94043
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.

2025-02-27Assigned to "Enfabrica"
archived source →
2026-07-17Assigned to "Enfabrica"

Nearby in the registry

The prefixes assigned immediately before and after 04:CA:8D:

FAQ

Which company owns MAC address prefix 04:CA:8D?: MAC address prefix 04:CA:8D is registered to Enfabrica in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 04:CA:8D has a network interface built by Enfabrica.
What is the OUI 04:CA:8D?: 04:CA:8D is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Enfabrica. It covers every address from 04:CA:8D:00:00:00 to 04:CA:8D:FF:FF:FF, or 16,777,216 addresses in total. It is also written 04-CA-8D.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in 04:CA:8D:00:00:00 that is 04:CA:8D — 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 Enfabrica located?: Enfabrica is listed at 295 N Bernardo Ave #200 Mountain View CA US 94043 in the IEEE OUI registry entry for 04:CA:8D. This is the address the organization registered with the IEEE, which may differ from its current operating address.