Which company owns MAC address prefix 00:19:52?

MAC address prefix 00:19:52 is registered to ACOGITO Co., Ltd in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 00:19:52 has a network interface built by ACOGITO Co., Ltd.

What is the OUI 00:19:52?

00:19:52 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to ACOGITO Co., Ltd. It covers every address from 00:19:52:00:00:00 to 00:19:52:FF:FF:FF, or 16,777,216 addresses in total. It is also written 00-19-52.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in 00:19:52:00:00:00 that is 00:19:52 — 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 ACOGITO Co., Ltd located?

ACOGITO Co., Ltd is listed at #501 Shinyoung Palace Tower, 246-2, Seohyun Sungnam Kyunggi KR 463-824 in the IEEE OUI registry entry for 00:19:52. This is the address the organization registered with the IEEE, which may differ from its current operating address.

ACOGITO Co., Ltd

MAC address prefix 00:19:52 is registered to ACOGITO Co., Ltd in the IEEE OUI registry. Any device whose MAC address begins with 00:19:52 has a network interface built by ACOGITO 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 00:19:52:00:00:00 to 00:19:52:FF:FF:FF.

OUI prefix: 00:19:52
Hyphen form: 00-19-52
MAC range: 00:19:52:00:00:00 – 00:19:52:FF:FF:FF
Addresses in block: 16,777,216
Organization: ACOGITO Co., Ltd
Address: #501 Shinyoung Palace Tower, 246-2, Seohyun Sungnam Kyunggi KR 463-824
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 "ACOGITO Co., Ltd"
archived source →
2026-07-17Assigned to "ACOGITO Co., Ltd"

Nearby in the registry

The prefixes assigned immediately before and after 00:19:52:

FAQ

Which company owns MAC address prefix 00:19:52?: MAC address prefix 00:19:52 is registered to ACOGITO Co., Ltd in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 00:19:52 has a network interface built by ACOGITO Co., Ltd.
What is the OUI 00:19:52?: 00:19:52 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to ACOGITO Co., Ltd. It covers every address from 00:19:52:00:00:00 to 00:19:52:FF:FF:FF, or 16,777,216 addresses in total. It is also written 00-19-52.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in 00:19:52:00:00:00 that is 00:19:52 — 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 ACOGITO Co., Ltd located?: ACOGITO Co., Ltd is listed at #501 Shinyoung Palace Tower, 246-2, Seohyun Sungnam Kyunggi KR 463-824 in the IEEE OUI registry entry for 00:19:52. This is the address the organization registered with the IEEE, which may differ from its current operating address.