Which company owns MAC address prefix 4C:9E:80?

MAC address prefix 4C:9E:80 is registered to KYOKKO ELECTRIC Co., Ltd. in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 4C:9E:80 has a network interface built by KYOKKO ELECTRIC Co., Ltd..

What is the OUI 4C:9E:80?

4C:9E:80 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to KYOKKO ELECTRIC Co., Ltd.. It covers every address from 4C:9E:80:00:00:00 to 4C:9E:80:FF:FF:FF, or 16,777,216 addresses in total. It is also written 4C-9E-80.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in 4C:9E:80:00:00:00 that is 4C:9E:80 — 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 KYOKKO ELECTRIC Co., Ltd. located?

KYOKKO ELECTRIC Co., Ltd. is listed at 5-7-20, Motomachi-dori, Chuo-Ku Kobe Hyogo JP 6500022 in the IEEE OUI registry entry for 4C:9E:80. This is the address the organization registered with the IEEE, which may differ from its current operating address.

KYOKKO ELECTRIC Co., Ltd.

MAC address prefix 4C:9E:80 is registered to KYOKKO ELECTRIC Co., Ltd. in the IEEE OUI registry. Any device whose MAC address begins with 4C:9E:80 has a network interface built by KYOKKO ELECTRIC 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 4C:9E:80:00:00:00 to 4C:9E:80:FF:FF:FF.

OUI prefix: 4C:9E:80
Hyphen form: 4C-9E-80
MAC range: 4C:9E:80:00:00:00 – 4C:9E:80:FF:FF:FF
Addresses in block: 16,777,216
Organization: KYOKKO ELECTRIC Co., Ltd.
Address: 5-7-20, Motomachi-dori, Chuo-Ku Kobe Hyogo JP 6500022
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 "KYOKKO ELECTRIC Co., Ltd."
archived source →
2026-07-17Assigned to "KYOKKO ELECTRIC Co., Ltd."

Nearby in the registry

The prefixes assigned immediately before and after 4C:9E:80:

FAQ

Which company owns MAC address prefix 4C:9E:80?: MAC address prefix 4C:9E:80 is registered to KYOKKO ELECTRIC Co., Ltd. in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 4C:9E:80 has a network interface built by KYOKKO ELECTRIC Co., Ltd..
What is the OUI 4C:9E:80?: 4C:9E:80 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to KYOKKO ELECTRIC Co., Ltd.. It covers every address from 4C:9E:80:00:00:00 to 4C:9E:80:FF:FF:FF, or 16,777,216 addresses in total. It is also written 4C-9E-80.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in 4C:9E:80:00:00:00 that is 4C:9E:80 — 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 KYOKKO ELECTRIC Co., Ltd. located?: KYOKKO ELECTRIC Co., Ltd. is listed at 5-7-20, Motomachi-dori, Chuo-Ku Kobe Hyogo JP 6500022 in the IEEE OUI registry entry for 4C:9E:80. This is the address the organization registered with the IEEE, which may differ from its current operating address.