Which company owns MAC address prefix B0:97:3A?

MAC address prefix B0:97:3A is registered to E-Fuel Corporation in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with B0:97:3A has a network interface built by E-Fuel Corporation.

What is the OUI B0:97:3A?

B0:97:3A is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to E-Fuel Corporation. It covers every address from B0:97:3A:00:00:00 to B0:97:3A:FF:FF:FF, or 16,777,216 addresses in total. It is also written B0-97-3A.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in B0:97:3A:00:00:00 that is B0:97:3A — 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 E-Fuel Corporation located?

E-Fuel Corporation is listed at 15466 Los Gatos Blvd. #37 Los Gatos CA US 95032 in the IEEE OUI registry entry for B0:97:3A. This is the address the organization registered with the IEEE, which may differ from its current operating address.

E-Fuel Corporation

MAC address prefix B0:97:3A is registered to E-Fuel Corporation in the IEEE OUI registry. Any device whose MAC address begins with B0:97:3A has a network interface built by E-Fuel Corporation. 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 B0:97:3A:00:00:00 to B0:97:3A:FF:FF:FF.

OUI prefix: B0:97:3A
Hyphen form: B0-97-3A
MAC range: B0:97:3A:00:00:00 – B0:97:3A:FF:FF:FF
Addresses in block: 16,777,216
Organization: E-Fuel Corporation
Address: 15466 Los Gatos Blvd. #37 Los Gatos CA US 95032
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 "E-Fuel Corporation"
archived source →
2026-07-17Assigned to "E-Fuel Corporation"

Nearby in the registry

The prefixes assigned immediately before and after B0:97:3A:

FAQ

Which company owns MAC address prefix B0:97:3A?: MAC address prefix B0:97:3A is registered to E-Fuel Corporation in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with B0:97:3A has a network interface built by E-Fuel Corporation.
What is the OUI B0:97:3A?: B0:97:3A is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to E-Fuel Corporation. It covers every address from B0:97:3A:00:00:00 to B0:97:3A:FF:FF:FF, or 16,777,216 addresses in total. It is also written B0-97-3A.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in B0:97:3A:00:00:00 that is B0:97:3A — 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 E-Fuel Corporation located?: E-Fuel Corporation is listed at 15466 Los Gatos Blvd. #37 Los Gatos CA US 95032 in the IEEE OUI registry entry for B0:97:3A. This is the address the organization registered with the IEEE, which may differ from its current operating address.