Which company owns MAC address prefix 0C:CB:8D?

MAC address prefix 0C:CB:8D is registered to ASCO Numatics GmbH in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 0C:CB:8D has a network interface built by ASCO Numatics GmbH.

What is the OUI 0C:CB:8D?

0C:CB:8D is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to ASCO Numatics GmbH. It covers every address from 0C:CB:8D:00:00:00 to 0C:CB:8D:FF:FF:FF, or 16,777,216 addresses in total. It is also written 0C-CB-8D.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in 0C:CB:8D:00:00:00 that is 0C:CB: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 ASCO Numatics GmbH located?

ASCO Numatics GmbH is listed at Otto-Hahn-Str. 7-11 Oelbronn-Duerrn DE 75248 in the IEEE OUI registry entry for 0C:CB:8D. This is the address the organization registered with the IEEE, which may differ from its current operating address.

ASCO Numatics GmbH

MAC address prefix 0C:CB:8D is registered to ASCO Numatics GmbH in the IEEE OUI registry. Any device whose MAC address begins with 0C:CB:8D has a network interface built by ASCO Numatics 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:CB:8D:00:00:00 to 0C:CB:8D:FF:FF:FF.

OUI prefix: 0C:CB:8D
Hyphen form: 0C-CB-8D
MAC range: 0C:CB:8D:00:00:00 – 0C:CB:8D:FF:FF:FF
Addresses in block: 16,777,216
Organization: ASCO Numatics GmbH
Address: Otto-Hahn-Str. 7-11 Oelbronn-Duerrn DE 75248
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 "ASCO Numatics GmbH"
archived source →
2026-07-17Assigned to "ASCO Numatics GmbH"

Nearby in the registry

The prefixes assigned immediately before and after 0C:CB:8D:

FAQ

Which company owns MAC address prefix 0C:CB:8D?: MAC address prefix 0C:CB:8D is registered to ASCO Numatics GmbH in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 0C:CB:8D has a network interface built by ASCO Numatics GmbH.
What is the OUI 0C:CB:8D?: 0C:CB:8D is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to ASCO Numatics GmbH. It covers every address from 0C:CB:8D:00:00:00 to 0C:CB:8D:FF:FF:FF, or 16,777,216 addresses in total. It is also written 0C-CB-8D.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in 0C:CB:8D:00:00:00 that is 0C:CB: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 ASCO Numatics GmbH located?: ASCO Numatics GmbH is listed at Otto-Hahn-Str. 7-11 Oelbronn-Duerrn DE 75248 in the IEEE OUI registry entry for 0C:CB:8D. This is the address the organization registered with the IEEE, which may differ from its current operating address.