Which company owns MAC address prefix 54:09:8D?

MAC address prefix 54:09:8D is registered to deister electronic GmbH in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 54:09:8D has a network interface built by deister electronic GmbH.

What is the OUI 54:09:8D?

54:09:8D is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to deister electronic GmbH. It covers every address from 54:09:8D:00:00:00 to 54:09:8D:FF:FF:FF, or 16,777,216 addresses in total. It is also written 54-09-8D.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in 54:09:8D:00:00:00 that is 54:09:8D — 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 deister electronic GmbH located?

deister electronic GmbH is listed at Hermann-Bahlsen-Str. 11 Barsinghausen Niedersachsen DE 30890 in the IEEE OUI registry entry for 54:09:8D. This is the address the organization registered with the IEEE, which may differ from its current operating address.

deister electronic GmbH

MAC address prefix 54:09:8D is registered to deister electronic GmbH in the IEEE OUI registry. Any device whose MAC address begins with 54:09:8D has a network interface built by deister 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 54:09:8D:00:00:00 to 54:09:8D:FF:FF:FF.

OUI prefix: 54:09:8D
Hyphen form: 54-09-8D
MAC range: 54:09:8D:00:00:00 – 54:09:8D:FF:FF:FF
Addresses in block: 16,777,216
Organization: deister electronic GmbH
Address: Hermann-Bahlsen-Str. 11 Barsinghausen Niedersachsen DE 30890
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 "deister electronic GmbH"
archived source →
2026-07-17Assigned to "deister electronic GmbH"

Nearby in the registry

The prefixes assigned immediately before and after 54:09:8D:

FAQ

Which company owns MAC address prefix 54:09:8D?: MAC address prefix 54:09:8D is registered to deister electronic GmbH in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 54:09:8D has a network interface built by deister electronic GmbH.
What is the OUI 54:09:8D?: 54:09:8D is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to deister electronic GmbH. It covers every address from 54:09:8D:00:00:00 to 54:09:8D:FF:FF:FF, or 16,777,216 addresses in total. It is also written 54-09-8D.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in 54:09:8D:00:00:00 that is 54:09:8D — 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 deister electronic GmbH located?: deister electronic GmbH is listed at Hermann-Bahlsen-Str. 11 Barsinghausen Niedersachsen DE 30890 in the IEEE OUI registry entry for 54:09:8D. This is the address the organization registered with the IEEE, which may differ from its current operating address.