Which company owns MAC address prefix 9C:5C:8D?

MAC address prefix 9C:5C:8D is registered to FIREMAX INDÚSTRIA E COMÉRCIO DE PRODUTOS ELETRÔNICOS LTDA in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 9C:5C:8D has a network interface built by FIREMAX INDÚSTRIA E COMÉRCIO DE PRODUTOS ELETRÔNICOS LTDA.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in 9C:5C:8D:00:00:00 that is 9C:5C:8D — 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.

FIREMAX INDÚSTRIA E COMÉRCIO DE PRODUTOS ELETRÔNICOS LTDA

MAC address prefix 9C:5C:8D is registered to FIREMAX INDÚSTRIA E COMÉRCIO DE PRODUTOS ELETRÔNICOS LTDA in the IEEE OUI registry. Any device whose MAC address begins with 9C:5C:8D has a network interface built by FIREMAX INDÚSTRIA E COMÉRCIO DE PRODUTOS ELETRÔNICOS LTDA. 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 9C:5C:8D:00:00:00 to 9C:5C:8D:FF:FF:FF.

OUI prefix: 9C:5C:8D
Hyphen form: 9C-5C-8D
MAC range: 9C:5C:8D:00:00:00 – 9C:5C:8D:FF:FF:FF
Addresses in block: 16,777,216
Organization: FIREMAX INDÚSTRIA E COMÉRCIO DE PRODUTOS ELETRÔNICOS LTDA
Address: R: Vicente de Felice, 589 - Jd.Ouro Verde Limeira São Paulo BR 13482-075
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 "FIREMAX INDÚSTRIA E COMÉRCIO DE PRODUTOS ELETRÔNICOS LTDA"
archived source →
2026-07-17Assigned to "FIREMAX INDÚSTRIA E COMÉRCIO DE PRODUTOS ELETRÔNICOS LTDA"

Nearby in the registry

The prefixes assigned immediately before and after 9C:5C:8D:

FAQ

Which company owns MAC address prefix 9C:5C:8D?: MAC address prefix 9C:5C:8D is registered to FIREMAX INDÚSTRIA E COMÉRCIO DE PRODUTOS ELETRÔNICOS LTDA in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 9C:5C:8D has a network interface built by FIREMAX INDÚSTRIA E COMÉRCIO DE PRODUTOS ELETRÔNICOS LTDA.
What is the OUI 9C:5C:8D?: 9C:5C:8D is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to FIREMAX INDÚSTRIA E COMÉRCIO DE PRODUTOS ELETRÔNICOS LTDA. It covers every address from 9C:5C:8D:00:00:00 to 9C:5C:8D:FF:FF:FF, or 16,777,216 addresses in total. It is also written 9C-5C-8D.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in 9C:5C:8D:00:00:00 that is 9C:5C:8D — 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 FIREMAX INDÚSTRIA E COMÉRCIO DE PRODUTOS ELETRÔNICOS LTDA located?: FIREMAX INDÚSTRIA E COMÉRCIO DE PRODUTOS ELETRÔNICOS LTDA is listed at R: Vicente de Felice, 589 - Jd.Ouro Verde Limeira São Paulo BR 13482-075 in the IEEE OUI registry entry for 9C:5C:8D. This is the address the organization registered with the IEEE, which may differ from its current operating address.