Which company owns MAC address prefix 18:79:A2?

MAC address prefix 18:79:A2 is registered to GMJ ELECTRIC LIMITED in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 18:79:A2 has a network interface built by GMJ ELECTRIC LIMITED.

What is the OUI 18:79:A2?

18:79:A2 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to GMJ ELECTRIC LIMITED. It covers every address from 18:79:A2:00:00:00 to 18:79:A2:FF:FF:FF, or 16,777,216 addresses in total. It is also written 18-79-A2.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in 18:79:A2:00:00:00 that is 18:79:A2 — 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 GMJ ELECTRIC LIMITED located?

GMJ ELECTRIC LIMITED is listed at RM 1405, 14/F, C C WU BUILDING HK 999077 in the IEEE OUI registry entry for 18:79:A2. This is the address the organization registered with the IEEE, which may differ from its current operating address.

GMJ ELECTRIC LIMITED

MAC address prefix 18:79:A2 is registered to GMJ ELECTRIC LIMITED in the IEEE OUI registry. Any device whose MAC address begins with 18:79:A2 has a network interface built by GMJ ELECTRIC LIMITED. 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 18:79:A2:00:00:00 to 18:79:A2:FF:FF:FF.

OUI prefix: 18:79:A2
Hyphen form: 18-79-A2
MAC range: 18:79:A2:00:00:00 – 18:79:A2:FF:FF:FF
Addresses in block: 16,777,216
Organization: GMJ ELECTRIC LIMITED
Address: RM 1405, 14/F, C C WU BUILDING HK 999077
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 "GMJ ELECTRIC LIMITED"
archived source →
2026-07-17Assigned to "GMJ ELECTRIC LIMITED"

Nearby in the registry

The prefixes assigned immediately before and after 18:79:A2:

FAQ

Which company owns MAC address prefix 18:79:A2?: MAC address prefix 18:79:A2 is registered to GMJ ELECTRIC LIMITED in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 18:79:A2 has a network interface built by GMJ ELECTRIC LIMITED.
What is the OUI 18:79:A2?: 18:79:A2 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to GMJ ELECTRIC LIMITED. It covers every address from 18:79:A2:00:00:00 to 18:79:A2:FF:FF:FF, or 16,777,216 addresses in total. It is also written 18-79-A2.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in 18:79:A2:00:00:00 that is 18:79:A2 — 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 GMJ ELECTRIC LIMITED located?: GMJ ELECTRIC LIMITED is listed at RM 1405, 14/F, C C WU BUILDING HK 999077 in the IEEE OUI registry entry for 18:79:A2. This is the address the organization registered with the IEEE, which may differ from its current operating address.