Which company owns MAC address prefix 9C:CE:22?

MAC address prefix 9C:CE:22 is registered to PROMED Soest GmbH in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 9C:CE:22 has a network interface built by PROMED Soest GmbH.

What is the OUI 9C:CE:22?

9C:CE:22 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to PROMED Soest GmbH. It covers every address from 9C:CE:22:00:00:00 to 9C:CE:22:FF:FF:FF, or 16,777,216 addresses in total. It is also written 9C-CE-22.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in 9C:CE:22:00:00:00 that is 9C:CE:22 — 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 PROMED Soest GmbH located?

PROMED Soest GmbH is listed at Wasserfuhr 5 Soest DE 59494 in the IEEE OUI registry entry for 9C:CE:22. This is the address the organization registered with the IEEE, which may differ from its current operating address.

PROMED Soest GmbH

MAC address prefix 9C:CE:22 is registered to PROMED Soest GmbH in the IEEE OUI registry. Any device whose MAC address begins with 9C:CE:22 has a network interface built by PROMED Soest 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 9C:CE:22:00:00:00 to 9C:CE:22:FF:FF:FF.

OUI prefix: 9C:CE:22
Hyphen form: 9C-CE-22
MAC range: 9C:CE:22:00:00:00 – 9C:CE:22:FF:FF:FF
Addresses in block: 16,777,216
Organization: PROMED Soest GmbH
Address: Wasserfuhr 5 Soest DE 59494
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.

2026-06-20Assigned to "PROMED Soest GmbH"
archived source →
2026-07-17Assigned to "PROMED Soest GmbH"

Nearby in the registry

The prefixes assigned immediately before and after 9C:CE:22:

FAQ

Which company owns MAC address prefix 9C:CE:22?: MAC address prefix 9C:CE:22 is registered to PROMED Soest GmbH in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 9C:CE:22 has a network interface built by PROMED Soest GmbH.
What is the OUI 9C:CE:22?: 9C:CE:22 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to PROMED Soest GmbH. It covers every address from 9C:CE:22:00:00:00 to 9C:CE:22:FF:FF:FF, or 16,777,216 addresses in total. It is also written 9C-CE-22.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in 9C:CE:22:00:00:00 that is 9C:CE:22 — 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 PROMED Soest GmbH located?: PROMED Soest GmbH is listed at Wasserfuhr 5 Soest DE 59494 in the IEEE OUI registry entry for 9C:CE:22. This is the address the organization registered with the IEEE, which may differ from its current operating address.