Which company owns MAC address prefix AC:4F:FC?

MAC address prefix AC:4F:FC is registered to SVS-VISTEK GmbH in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with AC:4F:FC has a network interface built by SVS-VISTEK GmbH.

What is the OUI AC:4F:FC?

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

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in AC:4F:FC:00:00:00 that is AC:4F:FC — 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 SVS-VISTEK GmbH located?

SVS-VISTEK GmbH is listed at Muehlbachstraße 20 Seefeld BY DE 82229 in the IEEE OUI registry entry for AC:4F:FC. This is the address the organization registered with the IEEE, which may differ from its current operating address.

SVS-VISTEK GmbH

MAC address prefix AC:4F:FC is registered to SVS-VISTEK GmbH in the IEEE OUI registry. Any device whose MAC address begins with AC:4F:FC has a network interface built by SVS-VISTEK 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 AC:4F:FC:00:00:00 to AC:4F:FC:FF:FF:FF.

OUI prefix: AC:4F:FC
Hyphen form: AC-4F-FC
MAC range: AC:4F:FC:00:00:00 – AC:4F:FC:FF:FF:FF
Addresses in block: 16,777,216
Organization: SVS-VISTEK GmbH
Address: Muehlbachstraße 20 Seefeld BY DE 82229
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 "SVS-VISTEK GmbH"
archived source →
2026-07-17Assigned to "SVS-VISTEK GmbH"

Nearby in the registry

The prefixes assigned immediately before and after AC:4F:FC:

FAQ

Which company owns MAC address prefix AC:4F:FC?: MAC address prefix AC:4F:FC is registered to SVS-VISTEK GmbH in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with AC:4F:FC has a network interface built by SVS-VISTEK GmbH.
What is the OUI AC:4F:FC?: AC:4F:FC is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to SVS-VISTEK GmbH. It covers every address from AC:4F:FC:00:00:00 to AC:4F:FC:FF:FF:FF, or 16,777,216 addresses in total. It is also written AC-4F-FC.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in AC:4F:FC:00:00:00 that is AC:4F:FC — 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 SVS-VISTEK GmbH located?: SVS-VISTEK GmbH is listed at Muehlbachstraße 20 Seefeld BY DE 82229 in the IEEE OUI registry entry for AC:4F:FC. This is the address the organization registered with the IEEE, which may differ from its current operating address.