Which company owns MAC address prefix 00:A7:84?

MAC address prefix 00:A7:84 is registered to ITX security in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 00:A7:84 has a network interface built by ITX security.

What is the OUI 00:A7:84?

00:A7:84 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to ITX security. It covers every address from 00:A7:84:00:00:00 to 00:A7:84:FF:FF:FF, or 16,777,216 addresses in total. It is also written 00-A7-84.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in 00:A7:84:00:00:00 that is 00:A7:84 — 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 ITX security located?

ITX security is listed at 9F Kolon Digital Tower Aston Bldg SEOUL (Outside US/Canada/China) KR 441-813 in the IEEE OUI registry entry for 00:A7:84. This is the address the organization registered with the IEEE, which may differ from its current operating address.

ITX security

MAC address prefix 00:A7:84 is registered to ITX security in the IEEE OUI registry. Any device whose MAC address begins with 00:A7:84 has a network interface built by ITX security. 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:A7:84:00:00:00 to 00:A7:84:FF:FF:FF.

OUI prefix: 00:A7:84
Hyphen form: 00-A7-84
MAC range: 00:A7:84:00:00:00 – 00:A7:84:FF:FF:FF
Addresses in block: 16,777,216
Organization: ITX security
Address: 9F Kolon Digital Tower Aston Bldg SEOUL (Outside US/Canada/China) KR 441-813
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 "ITX security"
archived source →
2026-07-17Assigned to "ITX security"

Nearby in the registry

The prefixes assigned immediately before and after 00:A7:84:

FAQ

Which company owns MAC address prefix 00:A7:84?: MAC address prefix 00:A7:84 is registered to ITX security in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 00:A7:84 has a network interface built by ITX security.
What is the OUI 00:A7:84?: 00:A7:84 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to ITX security. It covers every address from 00:A7:84:00:00:00 to 00:A7:84:FF:FF:FF, or 16,777,216 addresses in total. It is also written 00-A7-84.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in 00:A7:84:00:00:00 that is 00:A7:84 — 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 ITX security located?: ITX security is listed at 9F Kolon Digital Tower Aston Bldg SEOUL (Outside US/Canada/China) KR 441-813 in the IEEE OUI registry entry for 00:A7:84. This is the address the organization registered with the IEEE, which may differ from its current operating address.