Which company owns MAC address prefix C4:BA:99?

MAC address prefix C4:BA:99 is registered to I+ME Actia Informatik und Mikro-Elektronik GmbH in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with C4:BA:99 has a network interface built by I+ME Actia Informatik und Mikro-Elektronik GmbH.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in C4:BA:99:00:00:00 that is C4:BA:99 — 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.

I+ME Actia Informatik und Mikro-Elektronik GmbH

MAC address prefix C4:BA:99 is registered to I+ME Actia Informatik und Mikro-Elektronik GmbH in the IEEE OUI registry. Any device whose MAC address begins with C4:BA:99 has a network interface built by I+ME Actia Informatik und Mikro-Elektronik 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 C4:BA:99:00:00:00 to C4:BA:99:FF:FF:FF.

OUI prefix: C4:BA:99
Hyphen form: C4-BA-99
MAC range: C4:BA:99:00:00:00 – C4:BA:99:FF:FF:FF
Addresses in block: 16,777,216
Organization: I+ME Actia Informatik und Mikro-Elektronik GmbH
Address: Dresdenstrasse 17/18 Braunschweig Niedersachsen DE 38690
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 "I+ME Actia Informatik und Mikro-Elektronik GmbH"
archived source →
2026-07-17Assigned to "I+ME Actia Informatik und Mikro-Elektronik GmbH"

Nearby in the registry

The prefixes assigned immediately before and after C4:BA:99:

FAQ

Which company owns MAC address prefix C4:BA:99?: MAC address prefix C4:BA:99 is registered to I+ME Actia Informatik und Mikro-Elektronik GmbH in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with C4:BA:99 has a network interface built by I+ME Actia Informatik und Mikro-Elektronik GmbH.
What is the OUI C4:BA:99?: C4:BA:99 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to I+ME Actia Informatik und Mikro-Elektronik GmbH. It covers every address from C4:BA:99:00:00:00 to C4:BA:99:FF:FF:FF, or 16,777,216 addresses in total. It is also written C4-BA-99.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in C4:BA:99:00:00:00 that is C4:BA:99 — 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 I+ME Actia Informatik und Mikro-Elektronik GmbH located?: I+ME Actia Informatik und Mikro-Elektronik GmbH is listed at Dresdenstrasse 17/18 Braunschweig Niedersachsen DE 38690 in the IEEE OUI registry entry for C4:BA:99. This is the address the organization registered with the IEEE, which may differ from its current operating address.