Which company owns MAC address prefix 28:CD:4C?

MAC address prefix 28:CD:4C is registered to Individual Computers GmbH in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 28:CD:4C has a network interface built by Individual Computers GmbH.

What is the OUI 28:CD:4C?

28:CD:4C is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Individual Computers GmbH. It covers every address from 28:CD:4C:00:00:00 to 28:CD:4C:FF:FF:FF, or 16,777,216 addresses in total. It is also written 28-CD-4C.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in 28:CD:4C:00:00:00 that is 28:CD:4C — 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 Individual Computers GmbH located?

Individual Computers GmbH is listed at Im Zemmer 6 Woffelsbach NRW DE 52152 in the IEEE OUI registry entry for 28:CD:4C. This is the address the organization registered with the IEEE, which may differ from its current operating address.

Individual Computers GmbH

MAC address prefix 28:CD:4C is registered to Individual Computers GmbH in the IEEE OUI registry. Any device whose MAC address begins with 28:CD:4C has a network interface built by Individual Computers 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 28:CD:4C:00:00:00 to 28:CD:4C:FF:FF:FF.

OUI prefix: 28:CD:4C
Hyphen form: 28-CD-4C
MAC range: 28:CD:4C:00:00:00 – 28:CD:4C:FF:FF:FF
Addresses in block: 16,777,216
Organization: Individual Computers GmbH
Address: Im Zemmer 6 Woffelsbach NRW DE 52152
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 "Individual Computers GmbH"
archived source →
2026-07-17Assigned to "Individual Computers GmbH"

Nearby in the registry

The prefixes assigned immediately before and after 28:CD:4C:

FAQ

Which company owns MAC address prefix 28:CD:4C?: MAC address prefix 28:CD:4C is registered to Individual Computers GmbH in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 28:CD:4C has a network interface built by Individual Computers GmbH.
What is the OUI 28:CD:4C?: 28:CD:4C is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Individual Computers GmbH. It covers every address from 28:CD:4C:00:00:00 to 28:CD:4C:FF:FF:FF, or 16,777,216 addresses in total. It is also written 28-CD-4C.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in 28:CD:4C:00:00:00 that is 28:CD:4C — 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 Individual Computers GmbH located?: Individual Computers GmbH is listed at Im Zemmer 6 Woffelsbach NRW DE 52152 in the IEEE OUI registry entry for 28:CD:4C. This is the address the organization registered with the IEEE, which may differ from its current operating address.