Which company owns MAC address prefix 0C:5A:9E?

MAC address prefix 0C:5A:9E is registered to Wi-SUN Alliance in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 0C:5A:9E has a network interface built by Wi-SUN Alliance.

What is the OUI 0C:5A:9E?

0C:5A:9E is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Wi-SUN Alliance. It covers every address from 0C:5A:9E:00:00:00 to 0C:5A:9E:FF:FF:FF, or 16,777,216 addresses in total. It is also written 0C-5A-9E.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in 0C:5A:9E:00:00:00 that is 0C:5A:9E — 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 Wi-SUN Alliance located?

Wi-SUN Alliance is listed at 275 Tennant Avenue, Suite 202 Morgan Hill CA US 95037 in the IEEE OUI registry entry for 0C:5A:9E. This is the address the organization registered with the IEEE, which may differ from its current operating address.

Wi-SUN Alliance

MAC address prefix 0C:5A:9E is registered to Wi-SUN Alliance in the IEEE OUI registry. Any device whose MAC address begins with 0C:5A:9E has a network interface built by Wi-SUN Alliance. 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 0C:5A:9E:00:00:00 to 0C:5A:9E:FF:FF:FF.

OUI prefix: 0C:5A:9E
Hyphen form: 0C-5A-9E
MAC range: 0C:5A:9E:00:00:00 – 0C:5A:9E:FF:FF:FF
Addresses in block: 16,777,216
Organization: Wi-SUN Alliance
Address: 275 Tennant Avenue, Suite 202 Morgan Hill CA US 95037
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 "Wi-SUN Alliance"
archived source →
2026-07-17Assigned to "Wi-SUN Alliance"

Nearby in the registry

The prefixes assigned immediately before and after 0C:5A:9E:

FAQ

Which company owns MAC address prefix 0C:5A:9E?: MAC address prefix 0C:5A:9E is registered to Wi-SUN Alliance in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 0C:5A:9E has a network interface built by Wi-SUN Alliance.
What is the OUI 0C:5A:9E?: 0C:5A:9E is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Wi-SUN Alliance. It covers every address from 0C:5A:9E:00:00:00 to 0C:5A:9E:FF:FF:FF, or 16,777,216 addresses in total. It is also written 0C-5A-9E.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in 0C:5A:9E:00:00:00 that is 0C:5A:9E — 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 Wi-SUN Alliance located?: Wi-SUN Alliance is listed at 275 Tennant Avenue, Suite 202 Morgan Hill CA US 95037 in the IEEE OUI registry entry for 0C:5A:9E. This is the address the organization registered with the IEEE, which may differ from its current operating address.