Which company owns MAC address prefix B4:CC:04?

MAC address prefix B4:CC:04 is registered to Piranti in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with B4:CC:04 has a network interface built by Piranti.

What is the OUI B4:CC:04?

B4:CC:04 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Piranti. It covers every address from B4:CC:04:00:00:00 to B4:CC:04:FF:FF:FF, or 16,777,216 addresses in total. It is also written B4-CC-04.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in B4:CC:04:00:00:00 that is B4:CC:04 — 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 Piranti located?

Piranti is listed at 126, Beolmal-ro Dongan-gu, Anyang-si, Gyeonggi-do KR 14057 in the IEEE OUI registry entry for B4:CC:04. This is the address the organization registered with the IEEE, which may differ from its current operating address.

Piranti

MAC address prefix B4:CC:04 is registered to Piranti in the IEEE OUI registry. Any device whose MAC address begins with B4:CC:04 has a network interface built by Piranti. 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 B4:CC:04:00:00:00 to B4:CC:04:FF:FF:FF.

OUI prefix: B4:CC:04
Hyphen form: B4-CC-04
MAC range: B4:CC:04:00:00:00 – B4:CC:04:FF:FF:FF
Addresses in block: 16,777,216
Organization: Piranti
Address: 126, Beolmal-ro Dongan-gu, Anyang-si, Gyeonggi-do KR 14057
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.

2019-07-04Assigned to "Piranti"
archived source →
2026-07-17Assigned to "Piranti"

Nearby in the registry

The prefixes assigned immediately before and after B4:CC:04:

FAQ

Which company owns MAC address prefix B4:CC:04?: MAC address prefix B4:CC:04 is registered to Piranti in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with B4:CC:04 has a network interface built by Piranti.
What is the OUI B4:CC:04?: B4:CC:04 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Piranti. It covers every address from B4:CC:04:00:00:00 to B4:CC:04:FF:FF:FF, or 16,777,216 addresses in total. It is also written B4-CC-04.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in B4:CC:04:00:00:00 that is B4:CC:04 — 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 Piranti located?: Piranti is listed at 126, Beolmal-ro Dongan-gu, Anyang-si, Gyeonggi-do KR 14057 in the IEEE OUI registry entry for B4:CC:04. This is the address the organization registered with the IEEE, which may differ from its current operating address.