Which company owns MAC address prefix 80:56:3C?

MAC address prefix 80:56:3C is registered to ZF in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 80:56:3C has a network interface built by ZF.

What is the OUI 80:56:3C?

80:56:3C is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to ZF. It covers every address from 80:56:3C:00:00:00 to 80:56:3C:FF:FF:FF, or 16,777,216 addresses in total. It is also written 80-56-3C.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in 80:56:3C:00:00:00 that is 80:56:3C — 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.

ZF is listed at Ehlersstraße 50 Friedrichshafen BW DE 88046 in the IEEE OUI registry entry for 80:56:3C. This is the address the organization registered with the IEEE, which may differ from its current operating address.

ZF

MAC address prefix 80:56:3C is registered to ZF in the IEEE OUI registry. Any device whose MAC address begins with 80:56:3C has a network interface built by ZF. 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 80:56:3C:00:00:00 to 80:56:3C:FF:FF:FF.

OUI prefix: 80:56:3C
Hyphen form: 80-56-3C
MAC range: 80:56:3C:00:00:00 – 80:56:3C:FF:FF:FF
Addresses in block: 16,777,216
Organization: ZF
Address: Ehlersstraße 50 Friedrichshafen BW DE 88046
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 (1)

The IEEE registry publishes current state only — this is the change record we've kept since we started tracking it daily.

2026-07-17Assigned to "ZF"

Nearby in the registry

The prefixes assigned immediately before and after 80:56:3C:

FAQ

Which company owns MAC address prefix 80:56:3C?: MAC address prefix 80:56:3C is registered to ZF in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 80:56:3C has a network interface built by ZF.
What is the OUI 80:56:3C?: 80:56:3C is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to ZF. It covers every address from 80:56:3C:00:00:00 to 80:56:3C:FF:FF:FF, or 16,777,216 addresses in total. It is also written 80-56-3C.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in 80:56:3C:00:00:00 that is 80:56:3C — 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 ZF located?: ZF is listed at Ehlersstraße 50 Friedrichshafen BW DE 88046 in the IEEE OUI registry entry for 80:56:3C. This is the address the organization registered with the IEEE, which may differ from its current operating address.