Which company owns MAC address prefix 40:78:75?

MAC address prefix 40:78:75 is registered to IMBEL - Industria de Material Belico do Brasil in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 40:78:75 has a network interface built by IMBEL - Industria de Material Belico do Brasil.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in 40:78:75:00:00:00 that is 40:78:75 — 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 IMBEL - Industria de Material Belico do Brasil located?

IMBEL - Industria de Material Belico do Brasil is listed at Rua Monsenhor Manoel Gomes, 520 Rio de Janeiro RJ BR 20931-670 in the IEEE OUI registry entry for 40:78:75. This is the address the organization registered with the IEEE, which may differ from its current operating address.

IMBEL - Industria de Material Belico do Brasil

MAC address prefix 40:78:75 is registered to IMBEL - Industria de Material Belico do Brasil in the IEEE OUI registry. Any device whose MAC address begins with 40:78:75 has a network interface built by IMBEL - Industria de Material Belico do Brasil. 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 40:78:75:00:00:00 to 40:78:75:FF:FF:FF.

OUI prefix: 40:78:75
Hyphen form: 40-78-75
MAC range: 40:78:75:00:00:00 – 40:78:75:FF:FF:FF
Addresses in block: 16,777,216
Organization: IMBEL - Industria de Material Belico do Brasil
Address: Rua Monsenhor Manoel Gomes, 520 Rio de Janeiro RJ BR 20931-670
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 "IMBEL - Industria de Material Belico do Brasil"
archived source →
2026-07-17Assigned to "IMBEL - Industria de Material Belico do Brasil"

Nearby in the registry

The prefixes assigned immediately before and after 40:78:75:

FAQ

Which company owns MAC address prefix 40:78:75?: MAC address prefix 40:78:75 is registered to IMBEL - Industria de Material Belico do Brasil in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 40:78:75 has a network interface built by IMBEL - Industria de Material Belico do Brasil.
What is the OUI 40:78:75?: 40:78:75 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to IMBEL - Industria de Material Belico do Brasil. It covers every address from 40:78:75:00:00:00 to 40:78:75:FF:FF:FF, or 16,777,216 addresses in total. It is also written 40-78-75.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in 40:78:75:00:00:00 that is 40:78:75 — 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 IMBEL - Industria de Material Belico do Brasil located?: IMBEL - Industria de Material Belico do Brasil is listed at Rua Monsenhor Manoel Gomes, 520 Rio de Janeiro RJ BR 20931-670 in the IEEE OUI registry entry for 40:78:75. This is the address the organization registered with the IEEE, which may differ from its current operating address.