Which company owns MAC address prefix 84:79:33?

MAC address prefix 84:79:33 is registered to profichip GmbH in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 84:79:33 has a network interface built by profichip GmbH.

What is the OUI 84:79:33?

84:79:33 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to profichip GmbH. It covers every address from 84:79:33:00:00:00 to 84:79:33:FF:FF:FF, or 16,777,216 addresses in total. It is also written 84-79-33.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in 84:79:33:00:00:00 that is 84:79:33 — 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 profichip GmbH located?

profichip GmbH is listed at Einsteinstrasse 6 Herzogenaurach DE 91074 in the IEEE OUI registry entry for 84:79:33. This is the address the organization registered with the IEEE, which may differ from its current operating address.

profichip GmbH

MAC address prefix 84:79:33 is registered to profichip GmbH in the IEEE OUI registry. Any device whose MAC address begins with 84:79:33 has a network interface built by profichip 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 84:79:33:00:00:00 to 84:79:33:FF:FF:FF.

OUI prefix: 84:79:33
Hyphen form: 84-79-33
MAC range: 84:79:33:00:00:00 – 84:79:33:FF:FF:FF
Addresses in block: 16,777,216
Organization: profichip GmbH
Address: Einsteinstrasse 6 Herzogenaurach DE 91074
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.

2017-09-08Assigned to "profichip GmbH"
archived source →
2026-07-17Assigned to "profichip GmbH"

Nearby in the registry

The prefixes assigned immediately before and after 84:79:33:

FAQ

Which company owns MAC address prefix 84:79:33?: MAC address prefix 84:79:33 is registered to profichip GmbH in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 84:79:33 has a network interface built by profichip GmbH.
What is the OUI 84:79:33?: 84:79:33 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to profichip GmbH. It covers every address from 84:79:33:00:00:00 to 84:79:33:FF:FF:FF, or 16,777,216 addresses in total. It is also written 84-79-33.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in 84:79:33:00:00:00 that is 84:79:33 — 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 profichip GmbH located?: profichip GmbH is listed at Einsteinstrasse 6 Herzogenaurach DE 91074 in the IEEE OUI registry entry for 84:79:33. This is the address the organization registered with the IEEE, which may differ from its current operating address.