Which company owns MAC address prefix C4:92:4C?

MAC address prefix C4:92:4C is registered to KEISOKUKI CENTER CO.,LTD. in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with C4:92:4C has a network interface built by KEISOKUKI CENTER CO.,LTD..

What is the OUI C4:92:4C?

C4:92:4C is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to KEISOKUKI CENTER CO.,LTD.. It covers every address from C4:92:4C:00:00:00 to C4:92:4C:FF:FF:FF, or 16,777,216 addresses in total. It is also written C4-92-4C.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in C4:92:4C:00:00:00 that is C4:92:4C — 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 KEISOKUKI CENTER CO.,LTD. located?

KEISOKUKI CENTER CO.,LTD. is listed at 2-6-7 SAKANE KAWANISHI-CITY HYOGO JP 666-0021 in the IEEE OUI registry entry for C4:92:4C. This is the address the organization registered with the IEEE, which may differ from its current operating address.

KEISOKUKI CENTER CO.,LTD.

MAC address prefix C4:92:4C is registered to KEISOKUKI CENTER CO.,LTD. in the IEEE OUI registry. Any device whose MAC address begins with C4:92:4C has a network interface built by KEISOKUKI CENTER 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 C4:92:4C:00:00:00 to C4:92:4C:FF:FF:FF.

OUI prefix: C4:92:4C
Hyphen form: C4-92-4C
MAC range: C4:92:4C:00:00:00 – C4:92:4C:FF:FF:FF
Addresses in block: 16,777,216
Organization: KEISOKUKI CENTER CO.,LTD.
Address: 2-6-7 SAKANE KAWANISHI-CITY HYOGO JP 666-0021
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 "KEISOKUKI CENTER CO.,LTD."
archived source →
2026-07-17Assigned to "KEISOKUKI CENTER CO.,LTD."

Nearby in the registry

The prefixes assigned immediately before and after C4:92:4C:

FAQ

Which company owns MAC address prefix C4:92:4C?: MAC address prefix C4:92:4C is registered to KEISOKUKI CENTER CO.,LTD. in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with C4:92:4C has a network interface built by KEISOKUKI CENTER CO.,LTD..
What is the OUI C4:92:4C?: C4:92:4C is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to KEISOKUKI CENTER CO.,LTD.. It covers every address from C4:92:4C:00:00:00 to C4:92:4C:FF:FF:FF, or 16,777,216 addresses in total. It is also written C4-92-4C.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in C4:92:4C:00:00:00 that is C4:92:4C — 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 KEISOKUKI CENTER CO.,LTD. located?: KEISOKUKI CENTER CO.,LTD. is listed at 2-6-7 SAKANE KAWANISHI-CITY HYOGO JP 666-0021 in the IEEE OUI registry entry for C4:92:4C. This is the address the organization registered with the IEEE, which may differ from its current operating address.