Which company owns MAC address prefix 74:0B:B0?

MAC address prefix 74:0B:B0 is registered to Hirschmann Automation and Control GmbH in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 74:0B:B0 has a network interface built by Hirschmann Automation and Control GmbH.

What is the OUI 74:0B:B0?

74:0B:B0 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Hirschmann Automation and Control GmbH. It covers every address from 74:0B:B0:00:00:00 to 74:0B:B0:FF:FF:FF, or 16,777,216 addresses in total. It is also written 74-0B-B0.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in 74:0B:B0:00:00:00 that is 74:0B:B0 — 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 Hirschmann Automation and Control GmbH located?

Hirschmann Automation and Control GmbH is listed at Stuttgarter Straße 45-51 Neckartenzlingen DE D-72654 in the IEEE OUI registry entry for 74:0B:B0. This is the address the organization registered with the IEEE, which may differ from its current operating address.

How many MAC prefixes does Hirschmann Automation and Control GmbH own?

Hirschmann Automation and Control GmbH holds 6 OUI prefixes in the IEEE registry, of which 74:0B:B0 is one. A device made by Hirschmann Automation and Control GmbH could carry a MAC address from any of them.

Hirschmann Automation and Control GmbH

MAC address prefix 74:0B:B0 is registered to Hirschmann Automation and Control GmbH in the IEEE OUI registry. Any device whose MAC address begins with 74:0B:B0 has a network interface built by Hirschmann Automation and Control 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 74:0B:B0:00:00:00 to 74:0B:B0:FF:FF:FF.

OUI prefix: 74:0B:B0
Hyphen form: 74-0B-B0
MAC range: 74:0B:B0:00:00:00 – 74:0B:B0:FF:FF:FF
Addresses in block: 16,777,216
Organization: Hirschmann Automation and Control GmbH
Address: Stuttgarter Straße 45-51 Neckartenzlingen DE D-72654
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.

Other prefixes from Hirschmann Automation and Control GmbH

Hirschmann Automation and Control GmbH holds 6 OUI prefixes in total. A device with this exact prefix could just as well carry any of these:

Assignment history (2)

The IEEE registry publishes current state only — this is the change record we've kept since we started tracking it daily.

2024-02-15Assigned to "Hirschmann Automation and Control GmbH"
archived source →
2026-07-17Assigned to "Hirschmann Automation and Control GmbH"

Nearby in the registry

The prefixes assigned immediately before and after 74:0B:B0:

FAQ

Which company owns MAC address prefix 74:0B:B0?: MAC address prefix 74:0B:B0 is registered to Hirschmann Automation and Control GmbH in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 74:0B:B0 has a network interface built by Hirschmann Automation and Control GmbH.
What is the OUI 74:0B:B0?: 74:0B:B0 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Hirschmann Automation and Control GmbH. It covers every address from 74:0B:B0:00:00:00 to 74:0B:B0:FF:FF:FF, or 16,777,216 addresses in total. It is also written 74-0B-B0.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in 74:0B:B0:00:00:00 that is 74:0B:B0 — 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 Hirschmann Automation and Control GmbH located?: Hirschmann Automation and Control GmbH is listed at Stuttgarter Straße 45-51 Neckartenzlingen DE D-72654 in the IEEE OUI registry entry for 74:0B:B0. This is the address the organization registered with the IEEE, which may differ from its current operating address.
How many MAC prefixes does Hirschmann Automation and Control GmbH own?: Hirschmann Automation and Control GmbH holds 6 OUI prefixes in the IEEE registry, of which 74:0B:B0 is one. A device made by Hirschmann Automation and Control GmbH could carry a MAC address from any of them.