Which company owns MAC address prefix CC:7B:61?

MAC address prefix CC:7B:61 is registered to NIKKISO CO., LTD. in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with CC:7B:61 has a network interface built by NIKKISO CO., LTD..

What is the OUI CC:7B:61?

CC:7B:61 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to NIKKISO CO., LTD.. It covers every address from CC:7B:61:00:00:00 to CC:7B:61:FF:FF:FF, or 16,777,216 addresses in total. It is also written CC-7B-61.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in CC:7B:61:00:00:00 that is CC:7B:61 — 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 NIKKISO CO., LTD. located?

NIKKISO CO., LTD. is listed at Yebisu Garden Place Tower 22nd Floor, 20-3, Ebisu 4-Chome Shibuya-ku Tokyo JP 150-6022 in the IEEE OUI registry entry for CC:7B:61. This is the address the organization registered with the IEEE, which may differ from its current operating address.

NIKKISO CO., LTD.

MAC address prefix CC:7B:61 is registered to NIKKISO CO., LTD. in the IEEE OUI registry. Any device whose MAC address begins with CC:7B:61 has a network interface built by NIKKISO CO., LTD.. 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:7B:61:00:00:00 to CC:7B:61:FF:FF:FF.

OUI prefix: CC:7B:61
Hyphen form: CC-7B-61
MAC range: CC:7B:61:00:00:00 – CC:7B:61:FF:FF:FF
Addresses in block: 16,777,216
Organization: NIKKISO CO., LTD.
Address: Yebisu Garden Place Tower 22nd Floor, 20-3, Ebisu 4-Chome Shibuya-ku Tokyo JP 150-6022
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.

2018-12-21Assigned to "NIKKISO CO., LTD."
archived source →
2026-07-17Assigned to "NIKKISO CO., LTD."

Nearby in the registry

The prefixes assigned immediately before and after CC:7B:61:

FAQ

Which company owns MAC address prefix CC:7B:61?: MAC address prefix CC:7B:61 is registered to NIKKISO CO., LTD. in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with CC:7B:61 has a network interface built by NIKKISO CO., LTD..
What is the OUI CC:7B:61?: CC:7B:61 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to NIKKISO CO., LTD.. It covers every address from CC:7B:61:00:00:00 to CC:7B:61:FF:FF:FF, or 16,777,216 addresses in total. It is also written CC-7B-61.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in CC:7B:61:00:00:00 that is CC:7B:61 — 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 NIKKISO CO., LTD. located?: NIKKISO CO., LTD. is listed at Yebisu Garden Place Tower 22nd Floor, 20-3, Ebisu 4-Chome Shibuya-ku Tokyo JP 150-6022 in the IEEE OUI registry entry for CC:7B:61. This is the address the organization registered with the IEEE, which may differ from its current operating address.