Which company owns MAC address prefix 78:02:8F?

MAC address prefix 78:02:8F is registered to Adaptive Spectrum and Signal Alignment (ASSIA), Inc. in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 78:02:8F has a network interface built by Adaptive Spectrum and Signal Alignment (ASSIA), Inc..

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in 78:02:8F:00:00:00 that is 78:02:8F — 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.

Adaptive Spectrum and Signal Alignment (ASSIA), Inc.

MAC address prefix 78:02:8F is registered to Adaptive Spectrum and Signal Alignment (ASSIA), Inc. in the IEEE OUI registry. Any device whose MAC address begins with 78:02:8F has a network interface built by Adaptive Spectrum and Signal Alignment (ASSIA), 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 78:02:8F:00:00:00 to 78:02:8F:FF:FF:FF.

OUI prefix: 78:02:8F
Hyphen form: 78-02-8F
MAC range: 78:02:8F:00:00:00 – 78:02:8F:FF:FF:FF
Addresses in block: 16,777,216
Organization: Adaptive Spectrum and Signal Alignment (ASSIA), Inc.
Address: 333 Twin Dolphin Drive Redwood City CA US 94065
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 "Adaptive Spectrum and Signal Alignment (ASSIA), Inc."
archived source →
2026-07-17Assigned to "Adaptive Spectrum and Signal Alignment (ASSIA), Inc."

Nearby in the registry

The prefixes assigned immediately before and after 78:02:8F:

FAQ

Which company owns MAC address prefix 78:02:8F?: MAC address prefix 78:02:8F is registered to Adaptive Spectrum and Signal Alignment (ASSIA), Inc. in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 78:02:8F has a network interface built by Adaptive Spectrum and Signal Alignment (ASSIA), Inc..
What is the OUI 78:02:8F?: 78:02:8F is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Adaptive Spectrum and Signal Alignment (ASSIA), Inc.. It covers every address from 78:02:8F:00:00:00 to 78:02:8F:FF:FF:FF, or 16,777,216 addresses in total. It is also written 78-02-8F.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in 78:02:8F:00:00:00 that is 78:02:8F — 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 Adaptive Spectrum and Signal Alignment (ASSIA), Inc. located?: Adaptive Spectrum and Signal Alignment (ASSIA), Inc. is listed at 333 Twin Dolphin Drive Redwood City CA US 94065 in the IEEE OUI registry entry for 78:02:8F. This is the address the organization registered with the IEEE, which may differ from its current operating address.