Which company owns MAC address prefix A0:12:DB?

MAC address prefix A0:12:DB is registered to TABUCHI ELECTRIC CO.,LTD in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with A0:12:DB has a network interface built by TABUCHI ELECTRIC CO.,LTD.

What is the OUI A0:12:DB?

A0:12:DB is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to TABUCHI ELECTRIC CO.,LTD. It covers every address from A0:12:DB:00:00:00 to A0:12:DB:FF:FF:FF, or 16,777,216 addresses in total. It is also written A0-12-DB.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in A0:12:DB:00:00:00 that is A0:12:DB — 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 TABUCHI ELECTRIC CO.,LTD located?

TABUCHI ELECTRIC CO.,LTD is listed at 4-2-21 OSAKA JP 532-0003 in the IEEE OUI registry entry for A0:12:DB. This is the address the organization registered with the IEEE, which may differ from its current operating address.

TABUCHI ELECTRIC CO.,LTD

MAC address prefix A0:12:DB is registered to TABUCHI ELECTRIC CO.,LTD in the IEEE OUI registry. Any device whose MAC address begins with A0:12:DB has a network interface built by TABUCHI 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 A0:12:DB:00:00:00 to A0:12:DB:FF:FF:FF.

OUI prefix: A0:12:DB
Hyphen form: A0-12-DB
MAC range: A0:12:DB:00:00:00 – A0:12:DB:FF:FF:FF
Addresses in block: 16,777,216
Organization: TABUCHI ELECTRIC CO.,LTD
Address: 4-2-21 OSAKA JP 532-0003
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 "TABUCHI ELECTRIC CO.,LTD"
archived source →
2026-07-17Assigned to "TABUCHI ELECTRIC CO.,LTD"

Nearby in the registry

The prefixes assigned immediately before and after A0:12:DB:

FAQ

Which company owns MAC address prefix A0:12:DB?: MAC address prefix A0:12:DB is registered to TABUCHI ELECTRIC CO.,LTD in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with A0:12:DB has a network interface built by TABUCHI ELECTRIC CO.,LTD.
What is the OUI A0:12:DB?: A0:12:DB is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to TABUCHI ELECTRIC CO.,LTD. It covers every address from A0:12:DB:00:00:00 to A0:12:DB:FF:FF:FF, or 16,777,216 addresses in total. It is also written A0-12-DB.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in A0:12:DB:00:00:00 that is A0:12:DB — 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 TABUCHI ELECTRIC CO.,LTD located?: TABUCHI ELECTRIC CO.,LTD is listed at 4-2-21 OSAKA JP 532-0003 in the IEEE OUI registry entry for A0:12:DB. This is the address the organization registered with the IEEE, which may differ from its current operating address.