Which company owns MAC address prefix 2C:3F:3E?

MAC address prefix 2C:3F:3E is registered to Alge-Timing GmbH in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 2C:3F:3E has a network interface built by Alge-Timing GmbH.

What is the OUI 2C:3F:3E?

2C:3F:3E is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Alge-Timing GmbH. It covers every address from 2C:3F:3E:00:00:00 to 2C:3F:3E:FF:FF:FF, or 16,777,216 addresses in total. It is also written 2C-3F-3E.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in 2C:3F:3E:00:00:00 that is 2C:3F:3E — 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 Alge-Timing GmbH located?

Alge-Timing GmbH is listed at Rotkreuzstrasse 39 Lustenau AT 6890 in the IEEE OUI registry entry for 2C:3F:3E. This is the address the organization registered with the IEEE, which may differ from its current operating address.

Alge-Timing GmbH

MAC address prefix 2C:3F:3E is registered to Alge-Timing GmbH in the IEEE OUI registry. Any device whose MAC address begins with 2C:3F:3E has a network interface built by Alge-Timing GmbH. 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 2C:3F:3E:00:00:00 to 2C:3F:3E:FF:FF:FF.

OUI prefix: 2C:3F:3E
Hyphen form: 2C-3F-3E
MAC range: 2C:3F:3E:00:00:00 – 2C:3F:3E:FF:FF:FF
Addresses in block: 16,777,216
Organization: Alge-Timing GmbH
Address: Rotkreuzstrasse 39 Lustenau AT 6890
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 "Alge-Timing GmbH"
archived source →
2026-07-17Assigned to "Alge-Timing GmbH"

Nearby in the registry

The prefixes assigned immediately before and after 2C:3F:3E:

FAQ

Which company owns MAC address prefix 2C:3F:3E?: MAC address prefix 2C:3F:3E is registered to Alge-Timing GmbH in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 2C:3F:3E has a network interface built by Alge-Timing GmbH.
What is the OUI 2C:3F:3E?: 2C:3F:3E is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Alge-Timing GmbH. It covers every address from 2C:3F:3E:00:00:00 to 2C:3F:3E:FF:FF:FF, or 16,777,216 addresses in total. It is also written 2C-3F-3E.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in 2C:3F:3E:00:00:00 that is 2C:3F:3E — 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 Alge-Timing GmbH located?: Alge-Timing GmbH is listed at Rotkreuzstrasse 39 Lustenau AT 6890 in the IEEE OUI registry entry for 2C:3F:3E. This is the address the organization registered with the IEEE, which may differ from its current operating address.