Which company owns MAC address prefix F8:1C:E5?

MAC address prefix F8:1C:E5 is registered to Telefonbau Behnke GmbH in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with F8:1C:E5 has a network interface built by Telefonbau Behnke GmbH.

What is the OUI F8:1C:E5?

F8:1C:E5 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Telefonbau Behnke GmbH. It covers every address from F8:1C:E5:00:00:00 to F8:1C:E5:FF:FF:FF, or 16,777,216 addresses in total. It is also written F8-1C-E5.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in F8:1C:E5:00:00:00 that is F8:1C:E5 — 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 Telefonbau Behnke GmbH located?

Telefonbau Behnke GmbH is listed at Robert-Jungk-Str. 3 Kirkel Saarland DE 66459 in the IEEE OUI registry entry for F8:1C:E5. This is the address the organization registered with the IEEE, which may differ from its current operating address.

Telefonbau Behnke GmbH

MAC address prefix F8:1C:E5 is registered to Telefonbau Behnke GmbH in the IEEE OUI registry. Any device whose MAC address begins with F8:1C:E5 has a network interface built by Telefonbau Behnke 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 F8:1C:E5:00:00:00 to F8:1C:E5:FF:FF:FF.

OUI prefix: F8:1C:E5
Hyphen form: F8-1C-E5
MAC range: F8:1C:E5:00:00:00 – F8:1C:E5:FF:FF:FF
Addresses in block: 16,777,216
Organization: Telefonbau Behnke GmbH
Address: Robert-Jungk-Str. 3 Kirkel Saarland DE 66459
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 "Telefonbau Behnke GmbH"
archived source →
2026-07-17Assigned to "Telefonbau Behnke GmbH"

Nearby in the registry

The prefixes assigned immediately before and after F8:1C:E5:

FAQ

Which company owns MAC address prefix F8:1C:E5?: MAC address prefix F8:1C:E5 is registered to Telefonbau Behnke GmbH in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with F8:1C:E5 has a network interface built by Telefonbau Behnke GmbH.
What is the OUI F8:1C:E5?: F8:1C:E5 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Telefonbau Behnke GmbH. It covers every address from F8:1C:E5:00:00:00 to F8:1C:E5:FF:FF:FF, or 16,777,216 addresses in total. It is also written F8-1C-E5.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in F8:1C:E5:00:00:00 that is F8:1C:E5 — 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 Telefonbau Behnke GmbH located?: Telefonbau Behnke GmbH is listed at Robert-Jungk-Str. 3 Kirkel Saarland DE 66459 in the IEEE OUI registry entry for F8:1C:E5. This is the address the organization registered with the IEEE, which may differ from its current operating address.