Which company owns MAC address prefix F0:CF:4D?

MAC address prefix F0:CF:4D is registered to BitRecords GmbH in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with F0:CF:4D has a network interface built by BitRecords GmbH.

What is the OUI F0:CF:4D?

F0:CF:4D is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to BitRecords GmbH. It covers every address from F0:CF:4D:00:00:00 to F0:CF:4D:FF:FF:FF, or 16,777,216 addresses in total. It is also written F0-CF-4D.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in F0:CF:4D:00:00:00 that is F0:CF:4D — 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 BitRecords GmbH located?

BitRecords GmbH is listed at Marie-Curie-Ring 18 Flensburg DE 24941 in the IEEE OUI registry entry for F0:CF:4D. This is the address the organization registered with the IEEE, which may differ from its current operating address.

BitRecords GmbH

MAC address prefix F0:CF:4D is registered to BitRecords GmbH in the IEEE OUI registry. Any device whose MAC address begins with F0:CF:4D has a network interface built by BitRecords 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 F0:CF:4D:00:00:00 to F0:CF:4D:FF:FF:FF.

OUI prefix: F0:CF:4D
Hyphen form: F0-CF-4D
MAC range: F0:CF:4D:00:00:00 – F0:CF:4D:FF:FF:FF
Addresses in block: 16,777,216
Organization: BitRecords GmbH
Address: Marie-Curie-Ring 18 Flensburg DE 24941
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.

2024-06-23Assigned to "BitRecords GmbH"
archived source →
2026-07-17Assigned to "BitRecords GmbH"

Nearby in the registry

The prefixes assigned immediately before and after F0:CF:4D:

FAQ

Which company owns MAC address prefix F0:CF:4D?: MAC address prefix F0:CF:4D is registered to BitRecords GmbH in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with F0:CF:4D has a network interface built by BitRecords GmbH.
What is the OUI F0:CF:4D?: F0:CF:4D is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to BitRecords GmbH. It covers every address from F0:CF:4D:00:00:00 to F0:CF:4D:FF:FF:FF, or 16,777,216 addresses in total. It is also written F0-CF-4D.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in F0:CF:4D:00:00:00 that is F0:CF:4D — 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 BitRecords GmbH located?: BitRecords GmbH is listed at Marie-Curie-Ring 18 Flensburg DE 24941 in the IEEE OUI registry entry for F0:CF:4D. This is the address the organization registered with the IEEE, which may differ from its current operating address.