Which company owns MAC address prefix 00:09:AC?

MAC address prefix 00:09:AC is registered to LANVOICE in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 00:09:AC has a network interface built by LANVOICE.

What is the OUI 00:09:AC?

00:09:AC is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to LANVOICE. It covers every address from 00:09:AC:00:00:00 to 00:09:AC:FF:FF:FF, or 16,777,216 addresses in total. It is also written 00-09-AC.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in 00:09:AC:00:00:00 that is 00:09:AC — 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 LANVOICE located?

LANVOICE is listed at 1364-39 SeochoDong, #201 Jihun Bldg Seoul KR 137-072 in the IEEE OUI registry entry for 00:09:AC. This is the address the organization registered with the IEEE, which may differ from its current operating address.

LANVOICE

MAC address prefix 00:09:AC is registered to LANVOICE in the IEEE OUI registry. Any device whose MAC address begins with 00:09:AC has a network interface built by LANVOICE. 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 00:09:AC:00:00:00 to 00:09:AC:FF:FF:FF.

OUI prefix: 00:09:AC
Hyphen form: 00-09-AC
MAC range: 00:09:AC:00:00:00 – 00:09:AC:FF:FF:FF
Addresses in block: 16,777,216
Organization: LANVOICE
Address: 1364-39 SeochoDong, #201 Jihun Bldg Seoul KR 137-072
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 "LANVOICE"
archived source →
2026-07-17Assigned to "LANVOICE"

Nearby in the registry

The prefixes assigned immediately before and after 00:09:AC:

FAQ

Which company owns MAC address prefix 00:09:AC?: MAC address prefix 00:09:AC is registered to LANVOICE in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 00:09:AC has a network interface built by LANVOICE.
What is the OUI 00:09:AC?: 00:09:AC is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to LANVOICE. It covers every address from 00:09:AC:00:00:00 to 00:09:AC:FF:FF:FF, or 16,777,216 addresses in total. It is also written 00-09-AC.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in 00:09:AC:00:00:00 that is 00:09:AC — 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 LANVOICE located?: LANVOICE is listed at 1364-39 SeochoDong, #201 Jihun Bldg Seoul KR 137-072 in the IEEE OUI registry entry for 00:09:AC. This is the address the organization registered with the IEEE, which may differ from its current operating address.