Which company owns MAC address prefix A0:39:75?

MAC address prefix A0:39:75 is registered to Leo Bodnar Electronics Ltd in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with A0:39:75 has a network interface built by Leo Bodnar Electronics Ltd.

What is the OUI A0:39:75?

A0:39:75 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Leo Bodnar Electronics Ltd. It covers every address from A0:39:75:00:00:00 to A0:39:75:FF:FF:FF, or 16,777,216 addresses in total. It is also written A0-39-75.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in A0:39:75:00:00:00 that is A0:39:75 — 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 Leo Bodnar Electronics Ltd located?

Leo Bodnar Electronics Ltd is listed at Unit 8 New Rookery Farm Silverstone GB NN12 8UP in the IEEE OUI registry entry for A0:39:75. This is the address the organization registered with the IEEE, which may differ from its current operating address.

Leo Bodnar Electronics Ltd

MAC address prefix A0:39:75 is registered to Leo Bodnar Electronics Ltd in the IEEE OUI registry. Any device whose MAC address begins with A0:39:75 has a network interface built by Leo Bodnar Electronics Ltd. 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 A0:39:75:00:00:00 to A0:39:75:FF:FF:FF.

OUI prefix: A0:39:75
Hyphen form: A0-39-75
MAC range: A0:39:75:00:00:00 – A0:39:75:FF:FF:FF
Addresses in block: 16,777,216
Organization: Leo Bodnar Electronics Ltd
Address: Unit 8 New Rookery Farm Silverstone GB NN12 8UP
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.

2023-07-11Assigned to "Leo Bodnar Electronics Ltd"
archived source →
2026-07-17Assigned to "Leo Bodnar Electronics Ltd"

Nearby in the registry

The prefixes assigned immediately before and after A0:39:75:

FAQ

Which company owns MAC address prefix A0:39:75?: MAC address prefix A0:39:75 is registered to Leo Bodnar Electronics Ltd in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with A0:39:75 has a network interface built by Leo Bodnar Electronics Ltd.
What is the OUI A0:39:75?: A0:39:75 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Leo Bodnar Electronics Ltd. It covers every address from A0:39:75:00:00:00 to A0:39:75:FF:FF:FF, or 16,777,216 addresses in total. It is also written A0-39-75.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in A0:39:75:00:00:00 that is A0:39:75 — 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 Leo Bodnar Electronics Ltd located?: Leo Bodnar Electronics Ltd is listed at Unit 8 New Rookery Farm Silverstone GB NN12 8UP in the IEEE OUI registry entry for A0:39:75. This is the address the organization registered with the IEEE, which may differ from its current operating address.