Which company owns MAC address prefix 40:B0:2F?

MAC address prefix 40:B0:2F is registered to Miele & Cie. KG in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 40:B0:2F has a network interface built by Miele & Cie. KG.

What is the OUI 40:B0:2F?

40:B0:2F is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Miele & Cie. KG. It covers every address from 40:B0:2F:00:00:00 to 40:B0:2F:FF:FF:FF, or 16,777,216 addresses in total. It is also written 40-B0-2F.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in 40:B0:2F:00:00:00 that is 40:B0:2F — 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 Miele & Cie. KG located?

Miele & Cie. KG is listed at Carl-Miele-Straße 29 Gütersloh DE 33332 in the IEEE OUI registry entry for 40:B0:2F. This is the address the organization registered with the IEEE, which may differ from its current operating address.

How many MAC prefixes does Miele & Cie. KG own?

Miele & Cie. KG holds 2 OUI prefixes in the IEEE registry, of which 40:B0:2F is one. A device made by Miele & Cie. KG could carry a MAC address from any of them.

Miele & Cie. KG

MAC address prefix 40:B0:2F is registered to Miele & Cie. KG in the IEEE OUI registry. Any device whose MAC address begins with 40:B0:2F has a network interface built by Miele & Cie. 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 40:B0:2F:00:00:00 to 40:B0:2F:FF:FF:FF.

OUI prefix: 40:B0:2F
Hyphen form: 40-B0-2F
MAC range: 40:B0:2F:00:00:00 – 40:B0:2F:FF:FF:FF
Addresses in block: 16,777,216
Organization: Miele & Cie. KG
Address: Carl-Miele-Straße 29 Gütersloh DE 33332
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 Miele & Cie. KG

Miele & Cie. KG holds 2 OUI prefixes in total. A device with this exact prefix could just as well carry any of these:

00:1D:63

Assignment history (2)

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

2022-07-11Assigned to "Miele & Cie. KG"
archived source →
2026-07-17Assigned to "Miele & Cie. KG"

Nearby in the registry

The prefixes assigned immediately before and after 40:B0:2F:

FAQ

Which company owns MAC address prefix 40:B0:2F?: MAC address prefix 40:B0:2F is registered to Miele & Cie. KG in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 40:B0:2F has a network interface built by Miele & Cie. KG.
What is the OUI 40:B0:2F?: 40:B0:2F is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Miele & Cie. KG. It covers every address from 40:B0:2F:00:00:00 to 40:B0:2F:FF:FF:FF, or 16,777,216 addresses in total. It is also written 40-B0-2F.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in 40:B0:2F:00:00:00 that is 40:B0:2F — 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 Miele & Cie. KG located?: Miele & Cie. KG is listed at Carl-Miele-Straße 29 Gütersloh DE 33332 in the IEEE OUI registry entry for 40:B0:2F. This is the address the organization registered with the IEEE, which may differ from its current operating address.
How many MAC prefixes does Miele & Cie. KG own?: Miele & Cie. KG holds 2 OUI prefixes in the IEEE registry, of which 40:B0:2F is one. A device made by Miele & Cie. KG could carry a MAC address from any of them.