Which company owns MAC address prefix A0:41:5E?

MAC address prefix A0:41:5E is registered to Opsens Solution Inc. in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with A0:41:5E has a network interface built by Opsens Solution Inc..

What is the OUI A0:41:5E?

A0:41:5E is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Opsens Solution Inc.. It covers every address from A0:41:5E:00:00:00 to A0:41:5E:FF:FF:FF, or 16,777,216 addresses in total. It is also written A0-41-5E.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in A0:41:5E:00:00:00 that is A0:41:5E — 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 Opsens Solution Inc. located?

Opsens Solution Inc. is listed at 2014 rue Cyrille-Duquet, suite 125 Quebec QC CA G1N 4N6 in the IEEE OUI registry entry for A0:41:5E. This is the address the organization registered with the IEEE, which may differ from its current operating address.

Opsens Solution Inc.

MAC address prefix A0:41:5E is registered to Opsens Solution Inc. in the IEEE OUI registry. Any device whose MAC address begins with A0:41:5E has a network interface built by Opsens Solution Inc.. 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 A0:41:5E:00:00:00 to A0:41:5E:FF:FF:FF.

OUI prefix: A0:41:5E
Hyphen form: A0-41-5E
MAC range: A0:41:5E:00:00:00 – A0:41:5E:FF:FF:FF
Addresses in block: 16,777,216
Organization: Opsens Solution Inc.
Address: 2014 rue Cyrille-Duquet, suite 125 Quebec QC CA G1N 4N6
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 "Opsens Solution Inc."
archived source →
2026-07-17Assigned to "Opsens Solution Inc."

Nearby in the registry

The prefixes assigned immediately before and after A0:41:5E:

FAQ

Which company owns MAC address prefix A0:41:5E?: MAC address prefix A0:41:5E is registered to Opsens Solution Inc. in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with A0:41:5E has a network interface built by Opsens Solution Inc..
What is the OUI A0:41:5E?: A0:41:5E is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Opsens Solution Inc.. It covers every address from A0:41:5E:00:00:00 to A0:41:5E:FF:FF:FF, or 16,777,216 addresses in total. It is also written A0-41-5E.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in A0:41:5E:00:00:00 that is A0:41:5E — 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 Opsens Solution Inc. located?: Opsens Solution Inc. is listed at 2014 rue Cyrille-Duquet, suite 125 Quebec QC CA G1N 4N6 in the IEEE OUI registry entry for A0:41:5E. This is the address the organization registered with the IEEE, which may differ from its current operating address.