Which company owns MAC address prefix DC:64:7C?

MAC address prefix DC:64:7C is registered to C.R.S. iiMotion GmbH in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with DC:64:7C has a network interface built by C.R.S. iiMotion GmbH.

What is the OUI DC:64:7C?

DC:64:7C is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to C.R.S. iiMotion GmbH. It covers every address from DC:64:7C:00:00:00 to DC:64:7C:FF:FF:FF, or 16,777,216 addresses in total. It is also written DC-64-7C.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in DC:64:7C:00:00:00 that is DC:64:7C — 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 C.R.S. iiMotion GmbH located?

C.R.S. iiMotion GmbH is listed at Hermann-Schwer-Str. 3 Villingen-Schwenningen DE 78048 in the IEEE OUI registry entry for DC:64:7C. This is the address the organization registered with the IEEE, which may differ from its current operating address.

C.R.S. iiMotion GmbH

MAC address prefix DC:64:7C is registered to C.R.S. iiMotion GmbH in the IEEE OUI registry. Any device whose MAC address begins with DC:64:7C has a network interface built by C.R.S. iiMotion 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 DC:64:7C:00:00:00 to DC:64:7C:FF:FF:FF.

OUI prefix: DC:64:7C
Hyphen form: DC-64-7C
MAC range: DC:64:7C:00:00:00 – DC:64:7C:FF:FF:FF
Addresses in block: 16,777,216
Organization: C.R.S. iiMotion GmbH
Address: Hermann-Schwer-Str. 3 Villingen-Schwenningen DE 78048
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 "C.R.S. iiMotion GmbH"
archived source →
2026-07-17Assigned to "C.R.S. iiMotion GmbH"

Nearby in the registry

The prefixes assigned immediately before and after DC:64:7C:

FAQ

Which company owns MAC address prefix DC:64:7C?: MAC address prefix DC:64:7C is registered to C.R.S. iiMotion GmbH in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with DC:64:7C has a network interface built by C.R.S. iiMotion GmbH.
What is the OUI DC:64:7C?: DC:64:7C is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to C.R.S. iiMotion GmbH. It covers every address from DC:64:7C:00:00:00 to DC:64:7C:FF:FF:FF, or 16,777,216 addresses in total. It is also written DC-64-7C.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in DC:64:7C:00:00:00 that is DC:64:7C — 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 C.R.S. iiMotion GmbH located?: C.R.S. iiMotion GmbH is listed at Hermann-Schwer-Str. 3 Villingen-Schwenningen DE 78048 in the IEEE OUI registry entry for DC:64:7C. This is the address the organization registered with the IEEE, which may differ from its current operating address.