Which company owns MAC address prefix 74:73:1D?

MAC address prefix 74:73:1D is registered to ifm electronic gmbh in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 74:73:1D has a network interface built by ifm electronic gmbh.

What is the OUI 74:73:1D?

74:73:1D is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to ifm electronic gmbh. It covers every address from 74:73:1D:00:00:00 to 74:73:1D:FF:FF:FF, or 16,777,216 addresses in total. It is also written 74-73-1D.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in 74:73:1D:00:00:00 that is 74:73:1D — 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 ifm electronic gmbh located?

ifm electronic gmbh is listed at ifm-Straße 1 Tettnang BW DE 88069 in the IEEE OUI registry entry for 74:73:1D. This is the address the organization registered with the IEEE, which may differ from its current operating address.

ifm electronic gmbh

MAC address prefix 74:73:1D is registered to ifm electronic gmbh in the IEEE OUI registry. Any device whose MAC address begins with 74:73:1D has a network interface built by ifm electronic 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 74:73:1D:00:00:00 to 74:73:1D:FF:FF:FF.

OUI prefix: 74:73:1D
Hyphen form: 74-73-1D
MAC range: 74:73:1D:00:00:00 – 74:73:1D:FF:FF:FF
Addresses in block: 16,777,216
Organization: ifm electronic gmbh
Address: ifm-Straße 1 Tettnang BW DE 88069
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.

2020-11-28Assigned to "ifm electronic gmbh"
archived source →
2026-07-17Assigned to "ifm electronic gmbh"

Nearby in the registry

The prefixes assigned immediately before and after 74:73:1D:

FAQ

Which company owns MAC address prefix 74:73:1D?: MAC address prefix 74:73:1D is registered to ifm electronic gmbh in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 74:73:1D has a network interface built by ifm electronic gmbh.
What is the OUI 74:73:1D?: 74:73:1D is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to ifm electronic gmbh. It covers every address from 74:73:1D:00:00:00 to 74:73:1D:FF:FF:FF, or 16,777,216 addresses in total. It is also written 74-73-1D.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in 74:73:1D:00:00:00 that is 74:73:1D — 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 ifm electronic gmbh located?: ifm electronic gmbh is listed at ifm-Straße 1 Tettnang BW DE 88069 in the IEEE OUI registry entry for 74:73:1D. This is the address the organization registered with the IEEE, which may differ from its current operating address.