Which company owns MAC address prefix 00:1B:64?

MAC address prefix 00:1B:64 is registered to IsaacLandKorea Co., Ltd, in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 00:1B:64 has a network interface built by IsaacLandKorea Co., Ltd,.

What is the OUI 00:1B:64?

00:1B:64 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to IsaacLandKorea Co., Ltd,. It covers every address from 00:1B:64:00:00:00 to 00:1B:64:FF:FF:FF, or 16,777,216 addresses in total. It is also written 00-1B-64.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in 00:1B:64:00:00:00 that is 00:1B:64 — 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 IsaacLandKorea Co., Ltd, located?

IsaacLandKorea Co., Ltd, is listed at Rm 608, Hangang-Hyundai-Hyel Bldg. 2-36, Seoul KR 140-871 in the IEEE OUI registry entry for 00:1B:64. This is the address the organization registered with the IEEE, which may differ from its current operating address.

IsaacLandKorea Co., Ltd,

MAC address prefix 00:1B:64 is registered to IsaacLandKorea Co., Ltd, in the IEEE OUI registry. Any device whose MAC address begins with 00:1B:64 has a network interface built by IsaacLandKorea 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 00:1B:64:00:00:00 to 00:1B:64:FF:FF:FF.

OUI prefix: 00:1B:64
Hyphen form: 00-1B-64
MAC range: 00:1B:64:00:00:00 – 00:1B:64:FF:FF:FF
Addresses in block: 16,777,216
Organization: IsaacLandKorea Co., Ltd,
Address: Rm 608, Hangang-Hyundai-Hyel Bldg. 2-36, Seoul KR 140-871
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 "IsaacLandKorea Co., Ltd,"
archived source →
2026-07-17Assigned to "IsaacLandKorea Co., Ltd,"

Nearby in the registry

The prefixes assigned immediately before and after 00:1B:64:

FAQ

Which company owns MAC address prefix 00:1B:64?: MAC address prefix 00:1B:64 is registered to IsaacLandKorea Co., Ltd, in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 00:1B:64 has a network interface built by IsaacLandKorea Co., Ltd,.
What is the OUI 00:1B:64?: 00:1B:64 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to IsaacLandKorea Co., Ltd,. It covers every address from 00:1B:64:00:00:00 to 00:1B:64:FF:FF:FF, or 16,777,216 addresses in total. It is also written 00-1B-64.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in 00:1B:64:00:00:00 that is 00:1B:64 — 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 IsaacLandKorea Co., Ltd, located?: IsaacLandKorea Co., Ltd, is listed at Rm 608, Hangang-Hyundai-Hyel Bldg. 2-36, Seoul KR 140-871 in the IEEE OUI registry entry for 00:1B:64. This is the address the organization registered with the IEEE, which may differ from its current operating address.