Which company owns MAC address prefix B8:F4:D0?

MAC address prefix B8:F4:D0 is registered to Herrmann Ultraschalltechnik GmbH & Co. Kg in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with B8:F4:D0 has a network interface built by Herrmann Ultraschalltechnik GmbH & Co. Kg.

What is the OUI B8:F4:D0?

B8:F4:D0 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Herrmann Ultraschalltechnik GmbH & Co. Kg. It covers every address from B8:F4:D0:00:00:00 to B8:F4:D0:FF:FF:FF, or 16,777,216 addresses in total. It is also written B8-F4-D0.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in B8:F4:D0:00:00:00 that is B8:F4:D0 — 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 Herrmann Ultraschalltechnik GmbH & Co. Kg located?

Herrmann Ultraschalltechnik GmbH & Co. Kg is listed at Descostraße 3-9 Karlsbad Baden-Württemberg DE 76307 in the IEEE OUI registry entry for B8:F4:D0. This is the address the organization registered with the IEEE, which may differ from its current operating address.

Herrmann Ultraschalltechnik GmbH & Co. Kg

MAC address prefix B8:F4:D0 is registered to Herrmann Ultraschalltechnik GmbH & Co. Kg in the IEEE OUI registry. Any device whose MAC address begins with B8:F4:D0 has a network interface built by Herrmann Ultraschalltechnik GmbH & Co. Kg. 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 B8:F4:D0:00:00:00 to B8:F4:D0:FF:FF:FF.

OUI prefix: B8:F4:D0
Hyphen form: B8-F4-D0
MAC range: B8:F4:D0:00:00:00 – B8:F4:D0:FF:FF:FF
Addresses in block: 16,777,216
Organization: Herrmann Ultraschalltechnik GmbH & Co. Kg
Address: Descostraße 3-9 Karlsbad Baden-Württemberg DE 76307
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 "Herrmann Ultraschalltechnik GmbH & Co. Kg"
archived source →
2026-07-17Assigned to "Herrmann Ultraschalltechnik GmbH & Co. Kg"

Nearby in the registry

The prefixes assigned immediately before and after B8:F4:D0:

FAQ

Which company owns MAC address prefix B8:F4:D0?: MAC address prefix B8:F4:D0 is registered to Herrmann Ultraschalltechnik GmbH & Co. Kg in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with B8:F4:D0 has a network interface built by Herrmann Ultraschalltechnik GmbH & Co. Kg.
What is the OUI B8:F4:D0?: B8:F4:D0 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Herrmann Ultraschalltechnik GmbH & Co. Kg. It covers every address from B8:F4:D0:00:00:00 to B8:F4:D0:FF:FF:FF, or 16,777,216 addresses in total. It is also written B8-F4-D0.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in B8:F4:D0:00:00:00 that is B8:F4:D0 — 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 Herrmann Ultraschalltechnik GmbH & Co. Kg located?: Herrmann Ultraschalltechnik GmbH & Co. Kg is listed at Descostraße 3-9 Karlsbad Baden-Württemberg DE 76307 in the IEEE OUI registry entry for B8:F4:D0. This is the address the organization registered with the IEEE, which may differ from its current operating address.