Which company owns MAC address prefix BC:5C:4C?

MAC address prefix BC:5C:4C is registered to ELECOM CO.,LTD. in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with BC:5C:4C has a network interface built by ELECOM CO.,LTD..

What is the OUI BC:5C:4C?

BC:5C:4C is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to ELECOM CO.,LTD.. It covers every address from BC:5C:4C:00:00:00 to BC:5C:4C:FF:FF:FF, or 16,777,216 addresses in total. It is also written BC-5C-4C.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in BC:5C:4C:00:00:00 that is BC:5C: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 ELECOM CO.,LTD. located?

ELECOM CO.,LTD. is listed at 2F Kudan First Place Bldg. 4-1-28 Chiyoda-ku Kudan Kita JP 102-0073 in the IEEE OUI registry entry for BC:5C:4C. This is the address the organization registered with the IEEE, which may differ from its current operating address.

How many MAC prefixes does ELECOM CO.,LTD. own?

ELECOM CO.,LTD. holds 3 OUI prefixes in the IEEE registry, of which BC:5C:4C is one. A device made by ELECOM CO.,LTD. could carry a MAC address from any of them.

ELECOM CO.,LTD.

MAC address prefix BC:5C:4C is registered to ELECOM CO.,LTD. in the IEEE OUI registry. Any device whose MAC address begins with BC:5C:4C has a network interface built by ELECOM 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 BC:5C:4C:00:00:00 to BC:5C:4C:FF:FF:FF.

OUI prefix: BC:5C:4C
Hyphen form: BC-5C-4C
MAC range: BC:5C:4C:00:00:00 – BC:5C:4C:FF:FF:FF
Addresses in block: 16,777,216
Organization: ELECOM CO.,LTD.
Address: 2F Kudan First Place Bldg. 4-1-28 Chiyoda-ku Kudan Kita JP 102-0073
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 ELECOM CO.,LTD.

ELECOM CO.,LTD. holds 3 OUI prefixes in total. A device with this exact prefix could just as well carry any of these:

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 "ELECOM CO.,LTD."
archived source →
2026-07-17Assigned to "ELECOM CO.,LTD."

Nearby in the registry

The prefixes assigned immediately before and after BC:5C:4C:

FAQ

Which company owns MAC address prefix BC:5C:4C?: MAC address prefix BC:5C:4C is registered to ELECOM CO.,LTD. in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with BC:5C:4C has a network interface built by ELECOM CO.,LTD..
What is the OUI BC:5C:4C?: BC:5C:4C is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to ELECOM CO.,LTD.. It covers every address from BC:5C:4C:00:00:00 to BC:5C:4C:FF:FF:FF, or 16,777,216 addresses in total. It is also written BC-5C-4C.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in BC:5C:4C:00:00:00 that is BC:5C: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 ELECOM CO.,LTD. located?: ELECOM CO.,LTD. is listed at 2F Kudan First Place Bldg. 4-1-28 Chiyoda-ku Kudan Kita JP 102-0073 in the IEEE OUI registry entry for BC:5C:4C. This is the address the organization registered with the IEEE, which may differ from its current operating address.
How many MAC prefixes does ELECOM CO.,LTD. own?: ELECOM CO.,LTD. holds 3 OUI prefixes in the IEEE registry, of which BC:5C:4C is one. A device made by ELECOM CO.,LTD. could carry a MAC address from any of them.