Which company owns MAC address prefix A8:74:1D?

MAC address prefix A8:74:1D is registered to Phoenix Contact GmbH & Co. KG in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with A8:74:1D has a network interface built by Phoenix Contact GmbH & Co. KG.

What is the OUI A8:74:1D?

A8:74:1D is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Phoenix Contact GmbH & Co. KG. It covers every address from A8:74:1D:00:00:00 to A8:74:1D:FF:FF:FF, or 16,777,216 addresses in total. It is also written A8-74-1D.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in A8:74:1D:00:00:00 that is A8:74:1D — 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 Phoenix Contact GmbH & Co. KG located?

Phoenix Contact GmbH & Co. KG is listed at Dringenauer Str. 30 Bad Pyrmont - DE D-31812 in the IEEE OUI registry entry for A8:74:1D. This is the address the organization registered with the IEEE, which may differ from its current operating address.

How many MAC prefixes does Phoenix Contact GmbH & Co. KG own?

Phoenix Contact GmbH & Co. KG holds 3 OUI prefixes in the IEEE registry, of which A8:74:1D is one. A device made by Phoenix Contact GmbH & Co. KG could carry a MAC address from any of them.

Phoenix Contact GmbH & Co. KG

MAC address prefix A8:74:1D is registered to Phoenix Contact GmbH & Co. KG in the IEEE OUI registry. Any device whose MAC address begins with A8:74:1D has a network interface built by Phoenix Contact 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 A8:74:1D:00:00:00 to A8:74:1D:FF:FF:FF.

OUI prefix: A8:74:1D
Hyphen form: A8-74-1D
MAC range: A8:74:1D:00:00:00 – A8:74:1D:FF:FF:FF
Addresses in block: 16,777,216
Organization: Phoenix Contact GmbH & Co. KG
Address: Dringenauer Str. 30 Bad Pyrmont - DE D-31812
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 Phoenix Contact GmbH & Co. KG

Phoenix Contact GmbH & Co. KG holds 3 OUI prefixes in total. A device with this exact prefix could just as well carry any of these:

Assignment history (3)

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 "PHOENIX CONTACT Electronics GmbH"
archived source →
2024-11-20Renamed from "PHOENIX CONTACT Electronics GmbH" to "Phoenix Contact GmbH & Co. KG"
archived source →
2026-07-17Assigned to "Phoenix Contact GmbH & Co. KG"

Nearby in the registry

The prefixes assigned immediately before and after A8:74:1D:

FAQ

Which company owns MAC address prefix A8:74:1D?: MAC address prefix A8:74:1D is registered to Phoenix Contact GmbH & Co. KG in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with A8:74:1D has a network interface built by Phoenix Contact GmbH & Co. KG.
What is the OUI A8:74:1D?: A8:74:1D is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Phoenix Contact GmbH & Co. KG. It covers every address from A8:74:1D:00:00:00 to A8:74:1D:FF:FF:FF, or 16,777,216 addresses in total. It is also written A8-74-1D.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in A8:74:1D:00:00:00 that is A8:74:1D — 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 Phoenix Contact GmbH & Co. KG located?: Phoenix Contact GmbH & Co. KG is listed at Dringenauer Str. 30 Bad Pyrmont - DE D-31812 in the IEEE OUI registry entry for A8:74:1D. This is the address the organization registered with the IEEE, which may differ from its current operating address.
How many MAC prefixes does Phoenix Contact GmbH & Co. KG own?: Phoenix Contact GmbH & Co. KG holds 3 OUI prefixes in the IEEE registry, of which A8:74:1D is one. A device made by Phoenix Contact GmbH & Co. KG could carry a MAC address from any of them.