Which company owns MAC address prefix 48:E9:CA?

MAC address prefix 48:E9:CA is registered to creoline GmbH in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 48:E9:CA has a network interface built by creoline GmbH.

What is the OUI 48:E9:CA?

48:E9:CA is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to creoline GmbH. It covers every address from 48:E9:CA:00:00:00 to 48:E9:CA:FF:FF:FF, or 16,777,216 addresses in total. It is also written 48-E9-CA.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in 48:E9:CA:00:00:00 that is 48:E9:CA — 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 creoline GmbH located?

creoline GmbH is listed at Bergstr. 9A Altenberge North Rhine-Westphalia DE 48341 in the IEEE OUI registry entry for 48:E9:CA. This is the address the organization registered with the IEEE, which may differ from its current operating address.

creoline GmbH

MAC address prefix 48:E9:CA is registered to creoline GmbH in the IEEE OUI registry. Any device whose MAC address begins with 48:E9:CA has a network interface built by creoline 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 48:E9:CA:00:00:00 to 48:E9:CA:FF:FF:FF.

OUI prefix: 48:E9:CA
Hyphen form: 48-E9-CA
MAC range: 48:E9:CA:00:00:00 – 48:E9:CA:FF:FF:FF
Addresses in block: 16,777,216
Organization: creoline GmbH
Address: Bergstr. 9A Altenberge North Rhine-Westphalia DE 48341
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.

2024-02-15Assigned to "creoline GmbH"
archived source →
2026-07-17Assigned to "creoline GmbH"

Nearby in the registry

The prefixes assigned immediately before and after 48:E9:CA:

FAQ

Which company owns MAC address prefix 48:E9:CA?: MAC address prefix 48:E9:CA is registered to creoline GmbH in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 48:E9:CA has a network interface built by creoline GmbH.
What is the OUI 48:E9:CA?: 48:E9:CA is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to creoline GmbH. It covers every address from 48:E9:CA:00:00:00 to 48:E9:CA:FF:FF:FF, or 16,777,216 addresses in total. It is also written 48-E9-CA.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in 48:E9:CA:00:00:00 that is 48:E9:CA — 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 creoline GmbH located?: creoline GmbH is listed at Bergstr. 9A Altenberge North Rhine-Westphalia DE 48341 in the IEEE OUI registry entry for 48:E9:CA. This is the address the organization registered with the IEEE, which may differ from its current operating address.