Which company owns MAC address prefix 0C:B9:12?

MAC address prefix 0C:B9:12 is registered to JM-DATA GmbH in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 0C:B9:12 has a network interface built by JM-DATA GmbH.

What is the OUI 0C:B9:12?

0C:B9:12 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to JM-DATA GmbH. It covers every address from 0C:B9:12:00:00:00 to 0C:B9:12:FF:FF:FF, or 16,777,216 addresses in total. It is also written 0C-B9-12.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in 0C:B9:12:00:00:00 that is 0C:B9:12 — 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 JM-DATA GmbH located?

JM-DATA GmbH is listed at Hackl-Str. 1 Traun Upper Austria AT 4050 in the IEEE OUI registry entry for 0C:B9:12. This is the address the organization registered with the IEEE, which may differ from its current operating address.

JM-DATA GmbH

MAC address prefix 0C:B9:12 is registered to JM-DATA GmbH in the IEEE OUI registry. Any device whose MAC address begins with 0C:B9:12 has a network interface built by JM-DATA 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 0C:B9:12:00:00:00 to 0C:B9:12:FF:FF:FF.

OUI prefix: 0C:B9:12
Hyphen form: 0C-B9-12
MAC range: 0C:B9:12:00:00:00 – 0C:B9:12:FF:FF:FF
Addresses in block: 16,777,216
Organization: JM-DATA GmbH
Address: Hackl-Str. 1 Traun Upper Austria AT 4050
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.

2017-09-08Assigned to "JM-DATA GmbH"
archived source →
2026-07-17Assigned to "JM-DATA GmbH"

Nearby in the registry

The prefixes assigned immediately before and after 0C:B9:12:

FAQ

Which company owns MAC address prefix 0C:B9:12?: MAC address prefix 0C:B9:12 is registered to JM-DATA GmbH in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 0C:B9:12 has a network interface built by JM-DATA GmbH.
What is the OUI 0C:B9:12?: 0C:B9:12 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to JM-DATA GmbH. It covers every address from 0C:B9:12:00:00:00 to 0C:B9:12:FF:FF:FF, or 16,777,216 addresses in total. It is also written 0C-B9-12.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in 0C:B9:12:00:00:00 that is 0C:B9:12 — 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 JM-DATA GmbH located?: JM-DATA GmbH is listed at Hackl-Str. 1 Traun Upper Austria AT 4050 in the IEEE OUI registry entry for 0C:B9:12. This is the address the organization registered with the IEEE, which may differ from its current operating address.