Which company owns MAC address prefix AC:BD:0B?

MAC address prefix AC:BD:0B is registered to Leimac Ltd. in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with AC:BD:0B has a network interface built by Leimac Ltd..

What is the OUI AC:BD:0B?

AC:BD:0B is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Leimac Ltd.. It covers every address from AC:BD:0B:00:00:00 to AC:BD:0B:FF:FF:FF, or 16,777,216 addresses in total. It is also written AC-BD-0B.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in AC:BD:0B:00:00:00 that is AC:BD:0B — 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 Leimac Ltd. located?

Leimac Ltd. is listed at 1551, Sazukawa-chou Moriyama-shi Shiga-ken JP 524-0215 in the IEEE OUI registry entry for AC:BD:0B. This is the address the organization registered with the IEEE, which may differ from its current operating address.

Leimac Ltd.

MAC address prefix AC:BD:0B is registered to Leimac Ltd. in the IEEE OUI registry. Any device whose MAC address begins with AC:BD:0B has a network interface built by Leimac 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 AC:BD:0B:00:00:00 to AC:BD:0B:FF:FF:FF.

OUI prefix: AC:BD:0B
Hyphen form: AC-BD-0B
MAC range: AC:BD:0B:00:00:00 – AC:BD:0B:FF:FF:FF
Addresses in block: 16,777,216
Organization: Leimac Ltd.
Address: 1551, Sazukawa-chou Moriyama-shi Shiga-ken JP 524-0215
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 (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 "IMAC CO.,LTD"
archived source →
2020-03-21Renamed from "IMAC CO.,LTD" to "Leimac Ltd."
archived source →
2026-07-17Assigned to "Leimac Ltd."

Nearby in the registry

The prefixes assigned immediately before and after AC:BD:0B:

FAQ

Which company owns MAC address prefix AC:BD:0B?: MAC address prefix AC:BD:0B is registered to Leimac Ltd. in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with AC:BD:0B has a network interface built by Leimac Ltd..
What is the OUI AC:BD:0B?: AC:BD:0B is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Leimac Ltd.. It covers every address from AC:BD:0B:00:00:00 to AC:BD:0B:FF:FF:FF, or 16,777,216 addresses in total. It is also written AC-BD-0B.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in AC:BD:0B:00:00:00 that is AC:BD:0B — 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 Leimac Ltd. located?: Leimac Ltd. is listed at 1551, Sazukawa-chou Moriyama-shi Shiga-ken JP 524-0215 in the IEEE OUI registry entry for AC:BD:0B. This is the address the organization registered with the IEEE, which may differ from its current operating address.