Which company owns MAC address prefix C4:21:C8?

MAC address prefix C4:21:C8 is registered to KYOCERA CORPORATION in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with C4:21:C8 has a network interface built by KYOCERA CORPORATION.

What is the OUI C4:21:C8?

C4:21:C8 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to KYOCERA CORPORATION. It covers every address from C4:21:C8:00:00:00 to C4:21:C8:FF:FF:FF, or 16,777,216 addresses in total. It is also written C4-21-C8.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in C4:21:C8:00:00:00 that is C4:21:C8 — 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 KYOCERA CORPORATION located?

KYOCERA CORPORATION is listed at 2-1-1,Kagahara, Yokohama-shi Kanagawa JP 224-8502 in the IEEE OUI registry entry for C4:21:C8. This is the address the organization registered with the IEEE, which may differ from its current operating address.

How many MAC prefixes does KYOCERA CORPORATION own?

KYOCERA CORPORATION holds 6 OUI prefixes in the IEEE registry, of which C4:21:C8 is one. A device made by KYOCERA CORPORATION could carry a MAC address from any of them.

KYOCERA CORPORATION

MAC address prefix C4:21:C8 is registered to KYOCERA CORPORATION in the IEEE OUI registry. Any device whose MAC address begins with C4:21:C8 has a network interface built by KYOCERA CORPORATION. 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 C4:21:C8:00:00:00 to C4:21:C8:FF:FF:FF.

OUI prefix: C4:21:C8
Hyphen form: C4-21-C8
MAC range: C4:21:C8:00:00:00 – C4:21:C8:FF:FF:FF
Addresses in block: 16,777,216
Organization: KYOCERA CORPORATION
Address: 2-1-1,Kagahara, Yokohama-shi Kanagawa JP 224-8502
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.

Other prefixes from KYOCERA CORPORATION

KYOCERA CORPORATION holds 6 OUI prefixes in total. A device with this exact prefix could just as well carry any of these:

Assignment history (3)

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 "KYOCERA Corporation"
archived source →
2017-09-08Renamed from "KYOCERA Corporation" to "KYOCERA CORPORATION"
archived source →
2026-07-17Assigned to "KYOCERA CORPORATION"

Nearby in the registry

The prefixes assigned immediately before and after C4:21:C8:

FAQ

Which company owns MAC address prefix C4:21:C8?: MAC address prefix C4:21:C8 is registered to KYOCERA CORPORATION in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with C4:21:C8 has a network interface built by KYOCERA CORPORATION.
What is the OUI C4:21:C8?: C4:21:C8 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to KYOCERA CORPORATION. It covers every address from C4:21:C8:00:00:00 to C4:21:C8:FF:FF:FF, or 16,777,216 addresses in total. It is also written C4-21-C8.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in C4:21:C8:00:00:00 that is C4:21:C8 — 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 KYOCERA CORPORATION located?: KYOCERA CORPORATION is listed at 2-1-1,Kagahara, Yokohama-shi Kanagawa JP 224-8502 in the IEEE OUI registry entry for C4:21:C8. This is the address the organization registered with the IEEE, which may differ from its current operating address.
How many MAC prefixes does KYOCERA CORPORATION own?: KYOCERA CORPORATION holds 6 OUI prefixes in the IEEE registry, of which C4:21:C8 is one. A device made by KYOCERA CORPORATION could carry a MAC address from any of them.