Which company owns MAC address prefix CC:47:BD?

MAC address prefix CC:47:BD is registered to Rhombus Systems in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with CC:47:BD has a network interface built by Rhombus Systems.

What is the OUI CC:47:BD?

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

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in CC:47:BD:00:00:00 that is CC:47:BD — 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 Rhombus Systems located?

Rhombus Systems is listed at 770 L St, Suite 1480 Sacramento CA US 95814 in the IEEE OUI registry entry for CC:47:BD. This is the address the organization registered with the IEEE, which may differ from its current operating address.

Rhombus Systems

MAC address prefix CC:47:BD is registered to Rhombus Systems in the IEEE OUI registry. Any device whose MAC address begins with CC:47:BD has a network interface built by Rhombus Systems. 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 CC:47:BD:00:00:00 to CC:47:BD:FF:FF:FF.

OUI prefix: CC:47:BD
Hyphen form: CC-47-BD
MAC range: CC:47:BD:00:00:00 – CC:47:BD:FF:FF:FF
Addresses in block: 16,777,216
Organization: Rhombus Systems
Address: 770 L St, Suite 1480 Sacramento CA US 95814
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.

2020-08-05Assigned to "Rhombus Systems"
archived source →
2026-07-17Assigned to "Rhombus Systems"

Nearby in the registry

The prefixes assigned immediately before and after CC:47:BD:

FAQ

Which company owns MAC address prefix CC:47:BD?: MAC address prefix CC:47:BD is registered to Rhombus Systems in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with CC:47:BD has a network interface built by Rhombus Systems.
What is the OUI CC:47:BD?: CC:47:BD is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Rhombus Systems. It covers every address from CC:47:BD:00:00:00 to CC:47:BD:FF:FF:FF, or 16,777,216 addresses in total. It is also written CC-47-BD.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in CC:47:BD:00:00:00 that is CC:47:BD — 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 Rhombus Systems located?: Rhombus Systems is listed at 770 L St, Suite 1480 Sacramento CA US 95814 in the IEEE OUI registry entry for CC:47:BD. This is the address the organization registered with the IEEE, which may differ from its current operating address.