Which company owns MAC address prefix BC:81:99?

MAC address prefix BC:81:99 is registered to BASIC Co.,Ltd. in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with BC:81:99 has a network interface built by BASIC Co.,Ltd..

What is the OUI BC:81:99?

BC:81:99 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to BASIC Co.,Ltd.. It covers every address from BC:81:99:00:00:00 to BC:81:99:FF:FF:FF, or 16,777,216 addresses in total. It is also written BC-81-99.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in BC:81:99:00:00:00 that is BC:81:99 — 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 BASIC Co.,Ltd. located?

BASIC Co.,Ltd. is listed at Keiefu-Building 9F Minato-ku Tokyo JP 108-0014 in the IEEE OUI registry entry for BC:81:99. This is the address the organization registered with the IEEE, which may differ from its current operating address.

BASIC Co.,Ltd.

MAC address prefix BC:81:99 is registered to BASIC Co.,Ltd. in the IEEE OUI registry. Any device whose MAC address begins with BC:81:99 has a network interface built by BASIC 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:81:99:00:00:00 to BC:81:99:FF:FF:FF.

OUI prefix: BC:81:99
Hyphen form: BC-81-99
MAC range: BC:81:99:00:00:00 – BC:81:99:FF:FF:FF
Addresses in block: 16,777,216
Organization: BASIC Co.,Ltd.
Address: Keiefu-Building 9F Minato-ku Tokyo JP 108-0014
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 "BASIC Co.,Ltd."
archived source →
2026-07-17Assigned to "BASIC Co.,Ltd."

Nearby in the registry

The prefixes assigned immediately before and after BC:81:99:

FAQ

Which company owns MAC address prefix BC:81:99?: MAC address prefix BC:81:99 is registered to BASIC Co.,Ltd. in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with BC:81:99 has a network interface built by BASIC Co.,Ltd..
What is the OUI BC:81:99?: BC:81:99 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to BASIC Co.,Ltd.. It covers every address from BC:81:99:00:00:00 to BC:81:99:FF:FF:FF, or 16,777,216 addresses in total. It is also written BC-81-99.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in BC:81:99:00:00:00 that is BC:81:99 — 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 BASIC Co.,Ltd. located?: BASIC Co.,Ltd. is listed at Keiefu-Building 9F Minato-ku Tokyo JP 108-0014 in the IEEE OUI registry entry for BC:81:99. This is the address the organization registered with the IEEE, which may differ from its current operating address.