Which company owns MAC address prefix CC:B6:91?

MAC address prefix CC:B6:91 is registered to NECMagnusCommunications in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with CC:B6:91 has a network interface built by NECMagnusCommunications.

What is the OUI CC:B6:91?

CC:B6:91 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to NECMagnusCommunications. It covers every address from CC:B6:91:00:00:00 to CC:B6:91:FF:FF:FF, or 16,777,216 addresses in total. It is also written CC-B6-91.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in CC:B6:91:00:00:00 that is CC:B6:91 — 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 NECMagnusCommunications located?

NECMagnusCommunications is listed at 4-28 MITA 1Chome Minato-ku Tokyo JP 108-0073 in the IEEE OUI registry entry for CC:B6:91. This is the address the organization registered with the IEEE, which may differ from its current operating address.

NECMagnusCommunications

MAC address prefix CC:B6:91 is registered to NECMagnusCommunications in the IEEE OUI registry. Any device whose MAC address begins with CC:B6:91 has a network interface built by NECMagnusCommunications. 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:B6:91:00:00:00 to CC:B6:91:FF:FF:FF.

OUI prefix: CC:B6:91
Hyphen form: CC-B6-91
MAC range: CC:B6:91:00:00:00 – CC:B6:91:FF:FF:FF
Addresses in block: 16,777,216
Organization: NECMagnusCommunications
Address: 4-28 MITA 1Chome Minato-ku Tokyo JP 108-0073
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 "NECMagnusCommunications"
archived source →
2026-07-17Assigned to "NECMagnusCommunications"

Nearby in the registry

The prefixes assigned immediately before and after CC:B6:91:

FAQ

Which company owns MAC address prefix CC:B6:91?: MAC address prefix CC:B6:91 is registered to NECMagnusCommunications in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with CC:B6:91 has a network interface built by NECMagnusCommunications.
What is the OUI CC:B6:91?: CC:B6:91 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to NECMagnusCommunications. It covers every address from CC:B6:91:00:00:00 to CC:B6:91:FF:FF:FF, or 16,777,216 addresses in total. It is also written CC-B6-91.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in CC:B6:91:00:00:00 that is CC:B6:91 — 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 NECMagnusCommunications located?: NECMagnusCommunications is listed at 4-28 MITA 1Chome Minato-ku Tokyo JP 108-0073 in the IEEE OUI registry entry for CC:B6:91. This is the address the organization registered with the IEEE, which may differ from its current operating address.