Which company owns MAC address prefix 50:CE:E3?

MAC address prefix 50:CE:E3 is registered to Gigafirm.co.LTD in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 50:CE:E3 has a network interface built by Gigafirm.co.LTD.

What is the OUI 50:CE:E3?

50:CE:E3 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Gigafirm.co.LTD. It covers every address from 50:CE:E3:00:00:00 to 50:CE:E3:FF:FF:FF, or 16,777,216 addresses in total. It is also written 50-CE-E3.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in 50:CE:E3:00:00:00 that is 50:CE:E3 — 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 Gigafirm.co.LTD located?

Gigafirm.co.LTD is listed at 3-21-8,kisonishi machida-city tokyo JP 1940037 in the IEEE OUI registry entry for 50:CE:E3. This is the address the organization registered with the IEEE, which may differ from its current operating address.

Gigafirm.co.LTD

MAC address prefix 50:CE:E3 is registered to Gigafirm.co.LTD in the IEEE OUI registry. Any device whose MAC address begins with 50:CE:E3 has a network interface built by Gigafirm.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 50:CE:E3:00:00:00 to 50:CE:E3:FF:FF:FF.

OUI prefix: 50:CE:E3
Hyphen form: 50-CE-E3
MAC range: 50:CE:E3:00:00:00 – 50:CE:E3:FF:FF:FF
Addresses in block: 16,777,216
Organization: Gigafirm.co.LTD
Address: 3-21-8,kisonishi machida-city tokyo JP 1940037
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.

2019-07-04Assigned to "Gigafirm.co.LTD"
archived source →
2026-07-17Assigned to "Gigafirm.co.LTD"

Nearby in the registry

The prefixes assigned immediately before and after 50:CE:E3:

FAQ

Which company owns MAC address prefix 50:CE:E3?: MAC address prefix 50:CE:E3 is registered to Gigafirm.co.LTD in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 50:CE:E3 has a network interface built by Gigafirm.co.LTD.
What is the OUI 50:CE:E3?: 50:CE:E3 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Gigafirm.co.LTD. It covers every address from 50:CE:E3:00:00:00 to 50:CE:E3:FF:FF:FF, or 16,777,216 addresses in total. It is also written 50-CE-E3.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in 50:CE:E3:00:00:00 that is 50:CE:E3 — 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 Gigafirm.co.LTD located?: Gigafirm.co.LTD is listed at 3-21-8,kisonishi machida-city tokyo JP 1940037 in the IEEE OUI registry entry for 50:CE:E3. This is the address the organization registered with the IEEE, which may differ from its current operating address.