Which company owns MAC address prefix BC:B1:81?

MAC address prefix BC:B1:81 is registered to SHARP CORPORATION in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with BC:B1:81 has a network interface built by SHARP CORPORATION.

What is the OUI BC:B1:81?

BC:B1:81 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to SHARP CORPORATION. It covers every address from BC:B1:81:00:00:00 to BC:B1:81:FF:FF:FF, or 16,777,216 addresses in total. It is also written BC-B1-81.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in BC:B1:81:00:00:00 that is BC:B1:81 — 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 SHARP CORPORATION located?

SHARP CORPORATION is listed at 22-22,Nagaike-cho, Osaka, JP 545-8522, in the IEEE OUI registry entry for BC:B1:81. This is the address the organization registered with the IEEE, which may differ from its current operating address.

How many MAC prefixes does SHARP CORPORATION own?

SHARP CORPORATION holds 3 OUI prefixes in the IEEE registry, of which BC:B1:81 is one. A device made by SHARP CORPORATION could carry a MAC address from any of them.

SHARP CORPORATION

MAC address prefix BC:B1:81 is registered to SHARP CORPORATION in the IEEE OUI registry. Any device whose MAC address begins with BC:B1:81 has a network interface built by SHARP 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 BC:B1:81:00:00:00 to BC:B1:81:FF:FF:FF.

OUI prefix: BC:B1:81
Hyphen form: BC-B1-81
MAC range: BC:B1:81:00:00:00 – BC:B1:81:FF:FF:FF
Addresses in block: 16,777,216
Organization: SHARP CORPORATION
Address: 22-22,Nagaike-cho, Osaka, JP 545-8522,
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 SHARP CORPORATION

SHARP CORPORATION 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 "SHARP CORPORATION"
archived source →
2026-07-17Assigned to "SHARP CORPORATION"

Nearby in the registry

The prefixes assigned immediately before and after BC:B1:81:

FAQ

Which company owns MAC address prefix BC:B1:81?: MAC address prefix BC:B1:81 is registered to SHARP CORPORATION in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with BC:B1:81 has a network interface built by SHARP CORPORATION.
What is the OUI BC:B1:81?: BC:B1:81 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to SHARP CORPORATION. It covers every address from BC:B1:81:00:00:00 to BC:B1:81:FF:FF:FF, or 16,777,216 addresses in total. It is also written BC-B1-81.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in BC:B1:81:00:00:00 that is BC:B1:81 — 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 SHARP CORPORATION located?: SHARP CORPORATION is listed at 22-22,Nagaike-cho, Osaka, JP 545-8522, in the IEEE OUI registry entry for BC:B1:81. This is the address the organization registered with the IEEE, which may differ from its current operating address.
How many MAC prefixes does SHARP CORPORATION own?: SHARP CORPORATION holds 3 OUI prefixes in the IEEE registry, of which BC:B1:81 is one. A device made by SHARP CORPORATION could carry a MAC address from any of them.