Which company owns MAC address prefix 18:2A:44?

MAC address prefix 18:2A:44 is registered to HIROSE ELECTRONIC SYSTEM in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 18:2A:44 has a network interface built by HIROSE ELECTRONIC SYSTEM.

What is the OUI 18:2A:44?

18:2A:44 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to HIROSE ELECTRONIC SYSTEM. It covers every address from 18:2A:44:00:00:00 to 18:2A:44:FF:FF:FF, or 16,777,216 addresses in total. It is also written 18-2A-44.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in 18:2A:44:00:00:00 that is 18:2A:44 — 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 HIROSE ELECTRONIC SYSTEM located?

HIROSE ELECTRONIC SYSTEM is listed at 1-9-6 Ebisuminami Shibuya Tokyo JP 150-0022 in the IEEE OUI registry entry for 18:2A:44. This is the address the organization registered with the IEEE, which may differ from its current operating address.

HIROSE ELECTRONIC SYSTEM

MAC address prefix 18:2A:44 is registered to HIROSE ELECTRONIC SYSTEM in the IEEE OUI registry. Any device whose MAC address begins with 18:2A:44 has a network interface built by HIROSE ELECTRONIC SYSTEM. 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 18:2A:44:00:00:00 to 18:2A:44:FF:FF:FF.

OUI prefix: 18:2A:44
Hyphen form: 18-2A-44
MAC range: 18:2A:44:00:00:00 – 18:2A:44:FF:FF:FF
Addresses in block: 16,777,216
Organization: HIROSE ELECTRONIC SYSTEM
Address: 1-9-6 Ebisuminami Shibuya Tokyo JP 150-0022
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.

2018-12-21Assigned to "HIROSE ELECTRONIC SYSTEM"
archived source →
2026-07-17Assigned to "HIROSE ELECTRONIC SYSTEM"

Nearby in the registry

The prefixes assigned immediately before and after 18:2A:44:

FAQ

Which company owns MAC address prefix 18:2A:44?: MAC address prefix 18:2A:44 is registered to HIROSE ELECTRONIC SYSTEM in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 18:2A:44 has a network interface built by HIROSE ELECTRONIC SYSTEM.
What is the OUI 18:2A:44?: 18:2A:44 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to HIROSE ELECTRONIC SYSTEM. It covers every address from 18:2A:44:00:00:00 to 18:2A:44:FF:FF:FF, or 16,777,216 addresses in total. It is also written 18-2A-44.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in 18:2A:44:00:00:00 that is 18:2A:44 — 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 HIROSE ELECTRONIC SYSTEM located?: HIROSE ELECTRONIC SYSTEM is listed at 1-9-6 Ebisuminami Shibuya Tokyo JP 150-0022 in the IEEE OUI registry entry for 18:2A:44. This is the address the organization registered with the IEEE, which may differ from its current operating address.