Which company owns MAC address prefix BC:BB:C9?

MAC address prefix BC:BB:C9 is registered to Kellendonk Elektronik GmbH in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with BC:BB:C9 has a network interface built by Kellendonk Elektronik GmbH.

What is the OUI BC:BB:C9?

BC:BB:C9 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Kellendonk Elektronik GmbH. It covers every address from BC:BB:C9:00:00:00 to BC:BB:C9:FF:FF:FF, or 16,777,216 addresses in total. It is also written BC-BB-C9.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in BC:BB:C9:00:00:00 that is BC:BB:C9 — 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 Kellendonk Elektronik GmbH located?

Kellendonk Elektronik GmbH is listed at Butzweilerhof Allee 4 Cologne NRW DE 50829 in the IEEE OUI registry entry for BC:BB:C9. This is the address the organization registered with the IEEE, which may differ from its current operating address.

Kellendonk Elektronik GmbH

MAC address prefix BC:BB:C9 is registered to Kellendonk Elektronik GmbH in the IEEE OUI registry. Any device whose MAC address begins with BC:BB:C9 has a network interface built by Kellendonk Elektronik GmbH. 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 BC:BB:C9:00:00:00 to BC:BB:C9:FF:FF:FF.

OUI prefix: BC:BB:C9
Hyphen form: BC-BB-C9
MAC range: BC:BB:C9:00:00:00 – BC:BB:C9:FF:FF:FF
Addresses in block: 16,777,216
Organization: Kellendonk Elektronik GmbH
Address: Butzweilerhof Allee 4 Cologne NRW DE 50829
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 "Kellendonk Elektronik GmbH"
archived source →
2026-07-17Assigned to "Kellendonk Elektronik GmbH"

Nearby in the registry

The prefixes assigned immediately before and after BC:BB:C9:

FAQ

Which company owns MAC address prefix BC:BB:C9?: MAC address prefix BC:BB:C9 is registered to Kellendonk Elektronik GmbH in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with BC:BB:C9 has a network interface built by Kellendonk Elektronik GmbH.
What is the OUI BC:BB:C9?: BC:BB:C9 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Kellendonk Elektronik GmbH. It covers every address from BC:BB:C9:00:00:00 to BC:BB:C9:FF:FF:FF, or 16,777,216 addresses in total. It is also written BC-BB-C9.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in BC:BB:C9:00:00:00 that is BC:BB:C9 — 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 Kellendonk Elektronik GmbH located?: Kellendonk Elektronik GmbH is listed at Butzweilerhof Allee 4 Cologne NRW DE 50829 in the IEEE OUI registry entry for BC:BB:C9. This is the address the organization registered with the IEEE, which may differ from its current operating address.