Which company owns MAC address prefix E0:CF:2D?

MAC address prefix E0:CF:2D is registered to Gemintek Corporation in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with E0:CF:2D has a network interface built by Gemintek Corporation.

What is the OUI E0:CF:2D?

E0:CF:2D is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Gemintek Corporation. It covers every address from E0:CF:2D:00:00:00 to E0:CF:2D:FF:FF:FF, or 16,777,216 addresses in total. It is also written E0-CF-2D.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in E0:CF:2D:00:00:00 that is E0:CF:2D — 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 Gemintek Corporation located?

Gemintek Corporation is listed at 5F-1, No.8, Alley 30, Lane 358, Rueiguang Rd. Taipei TW 114 in the IEEE OUI registry entry for E0:CF:2D. This is the address the organization registered with the IEEE, which may differ from its current operating address.

Gemintek Corporation

MAC address prefix E0:CF:2D is registered to Gemintek Corporation in the IEEE OUI registry. Any device whose MAC address begins with E0:CF:2D has a network interface built by Gemintek Corporation. 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 E0:CF:2D:00:00:00 to E0:CF:2D:FF:FF:FF.

OUI prefix: E0:CF:2D
Hyphen form: E0-CF-2D
MAC range: E0:CF:2D:00:00:00 – E0:CF:2D:FF:FF:FF
Addresses in block: 16,777,216
Organization: Gemintek Corporation
Address: 5F-1, No.8, Alley 30, Lane 358, Rueiguang Rd. Taipei TW 114
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 "Gemintek Corporation"
archived source →
2026-07-17Assigned to "Gemintek Corporation"

Nearby in the registry

The prefixes assigned immediately before and after E0:CF:2D:

FAQ

Which company owns MAC address prefix E0:CF:2D?: MAC address prefix E0:CF:2D is registered to Gemintek Corporation in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with E0:CF:2D has a network interface built by Gemintek Corporation.
What is the OUI E0:CF:2D?: E0:CF:2D is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Gemintek Corporation. It covers every address from E0:CF:2D:00:00:00 to E0:CF:2D:FF:FF:FF, or 16,777,216 addresses in total. It is also written E0-CF-2D.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in E0:CF:2D:00:00:00 that is E0:CF:2D — 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 Gemintek Corporation located?: Gemintek Corporation is listed at 5F-1, No.8, Alley 30, Lane 358, Rueiguang Rd. Taipei TW 114 in the IEEE OUI registry entry for E0:CF:2D. This is the address the organization registered with the IEEE, which may differ from its current operating address.