Which company owns MAC address prefix 40:25:08?

MAC address prefix 40:25:08 is registered to Highway 9 Networks, Inc. in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 40:25:08 has a network interface built by Highway 9 Networks, Inc..

What is the OUI 40:25:08?

40:25:08 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Highway 9 Networks, Inc.. It covers every address from 40:25:08:00:00:00 to 40:25:08:FF:FF:FF, or 16,777,216 addresses in total. It is also written 40-25-08.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in 40:25:08:00:00:00 that is 40:25:08 — 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 Highway 9 Networks, Inc. located?

Highway 9 Networks, Inc. is listed at 2350 Mission College Blvd Ste 490 Santa Clara US 95054 in the IEEE OUI registry entry for 40:25:08. This is the address the organization registered with the IEEE, which may differ from its current operating address.

Highway 9 Networks, Inc.

MAC address prefix 40:25:08 is registered to Highway 9 Networks, Inc. in the IEEE OUI registry. Any device whose MAC address begins with 40:25:08 has a network interface built by Highway 9 Networks, 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 40:25:08:00:00:00 to 40:25:08:FF:FF:FF.

OUI prefix: 40:25:08
Hyphen form: 40-25-08
MAC range: 40:25:08:00:00:00 – 40:25:08:FF:FF:FF
Addresses in block: 16,777,216
Organization: Highway 9 Networks, Inc.
Address: 2350 Mission College Blvd Ste 490 Santa Clara US 95054
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.

2025-02-27Assigned to "Highway 9 Networks, Inc."
archived source →
2026-07-17Assigned to "Highway 9 Networks, Inc."

Nearby in the registry

The prefixes assigned immediately before and after 40:25:08:

FAQ

Which company owns MAC address prefix 40:25:08?: MAC address prefix 40:25:08 is registered to Highway 9 Networks, Inc. in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 40:25:08 has a network interface built by Highway 9 Networks, Inc..
What is the OUI 40:25:08?: 40:25:08 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Highway 9 Networks, Inc.. It covers every address from 40:25:08:00:00:00 to 40:25:08:FF:FF:FF, or 16,777,216 addresses in total. It is also written 40-25-08.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in 40:25:08:00:00:00 that is 40:25:08 — 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 Highway 9 Networks, Inc. located?: Highway 9 Networks, Inc. is listed at 2350 Mission College Blvd Ste 490 Santa Clara US 95054 in the IEEE OUI registry entry for 40:25:08. This is the address the organization registered with the IEEE, which may differ from its current operating address.