Which company owns MAC address prefix 74:32:56?

MAC address prefix 74:32:56 is registered to NT-ware Systemprg GmbH in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 74:32:56 has a network interface built by NT-ware Systemprg GmbH.

What is the OUI 74:32:56?

74:32:56 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to NT-ware Systemprg GmbH. It covers every address from 74:32:56:00:00:00 to 74:32:56:FF:FF:FF, or 16,777,216 addresses in total. It is also written 74-32-56.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in 74:32:56:00:00:00 that is 74:32:56 — 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 NT-ware Systemprg GmbH located?

NT-ware Systemprg GmbH is listed at Niedersachsenstrasse 6 Bad Iburg NDS DE 49186 in the IEEE OUI registry entry for 74:32:56. This is the address the organization registered with the IEEE, which may differ from its current operating address.

NT-ware Systemprg GmbH

MAC address prefix 74:32:56 is registered to NT-ware Systemprg GmbH in the IEEE OUI registry. Any device whose MAC address begins with 74:32:56 has a network interface built by NT-ware Systemprg 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 74:32:56:00:00:00 to 74:32:56:FF:FF:FF.

OUI prefix: 74:32:56
Hyphen form: 74-32-56
MAC range: 74:32:56:00:00:00 – 74:32:56:FF:FF:FF
Addresses in block: 16,777,216
Organization: NT-ware Systemprg GmbH
Address: Niedersachsenstrasse 6 Bad Iburg NDS DE 49186
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 "NT-ware Systemprg GmbH"
archived source →
2026-07-17Assigned to "NT-ware Systemprg GmbH"

Nearby in the registry

The prefixes assigned immediately before and after 74:32:56:

FAQ

Which company owns MAC address prefix 74:32:56?: MAC address prefix 74:32:56 is registered to NT-ware Systemprg GmbH in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 74:32:56 has a network interface built by NT-ware Systemprg GmbH.
What is the OUI 74:32:56?: 74:32:56 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to NT-ware Systemprg GmbH. It covers every address from 74:32:56:00:00:00 to 74:32:56:FF:FF:FF, or 16,777,216 addresses in total. It is also written 74-32-56.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in 74:32:56:00:00:00 that is 74:32:56 — 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 NT-ware Systemprg GmbH located?: NT-ware Systemprg GmbH is listed at Niedersachsenstrasse 6 Bad Iburg NDS DE 49186 in the IEEE OUI registry entry for 74:32:56. This is the address the organization registered with the IEEE, which may differ from its current operating address.