Which company owns MAC address prefix 40:C4:8C?

MAC address prefix 40:C4:8C is registered to N-iTUS CO.,LTD. in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 40:C4:8C has a network interface built by N-iTUS CO.,LTD..

What is the OUI 40:C4:8C?

40:C4:8C is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to N-iTUS CO.,LTD.. It covers every address from 40:C4:8C:00:00:00 to 40:C4:8C:FF:FF:FF, or 16,777,216 addresses in total. It is also written 40-C4-8C.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in 40:C4:8C:00:00:00 that is 40:C4:8C — 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 N-iTUS CO.,LTD. located?

N-iTUS CO.,LTD. is listed at NiTUS 85, Deokcheon-ro Anyang-si Gyeonggi-do, Korea KR 14086 in the IEEE OUI registry entry for 40:C4:8C. This is the address the organization registered with the IEEE, which may differ from its current operating address.

N-iTUS CO.,LTD.

MAC address prefix 40:C4:8C is registered to N-iTUS CO.,LTD. in the IEEE OUI registry. Any device whose MAC address begins with 40:C4:8C has a network interface built by N-iTUS 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 40:C4:8C:00:00:00 to 40:C4:8C:FF:FF:FF.

OUI prefix: 40:C4:8C
Hyphen form: 40-C4-8C
MAC range: 40:C4:8C:00:00:00 – 40:C4:8C:FF:FF:FF
Addresses in block: 16,777,216
Organization: N-iTUS CO.,LTD.
Address: NiTUS 85, Deokcheon-ro Anyang-si Gyeonggi-do, Korea KR 14086
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 (1)

The IEEE registry publishes current state only — this is the change record we've kept since we started tracking it daily.

2026-07-17Assigned to "N-iTUS CO.,LTD."

Nearby in the registry

The prefixes assigned immediately before and after 40:C4:8C:

FAQ

Which company owns MAC address prefix 40:C4:8C?: MAC address prefix 40:C4:8C is registered to N-iTUS CO.,LTD. in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 40:C4:8C has a network interface built by N-iTUS CO.,LTD..
What is the OUI 40:C4:8C?: 40:C4:8C is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to N-iTUS CO.,LTD.. It covers every address from 40:C4:8C:00:00:00 to 40:C4:8C:FF:FF:FF, or 16,777,216 addresses in total. It is also written 40-C4-8C.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in 40:C4:8C:00:00:00 that is 40:C4:8C — 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 N-iTUS CO.,LTD. located?: N-iTUS CO.,LTD. is listed at NiTUS 85, Deokcheon-ro Anyang-si Gyeonggi-do, Korea KR 14086 in the IEEE OUI registry entry for 40:C4:8C. This is the address the organization registered with the IEEE, which may differ from its current operating address.