Which company owns MAC address prefix 30:9F:FB?

MAC address prefix 30:9F:FB is registered to Ardomus Networks Corporation in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 30:9F:FB has a network interface built by Ardomus Networks Corporation.

What is the OUI 30:9F:FB?

30:9F:FB is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Ardomus Networks Corporation. It covers every address from 30:9F:FB:00:00:00 to 30:9F:FB:FF:FF:FF, or 16,777,216 addresses in total. It is also written 30-9F-FB.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in 30:9F:FB:00:00:00 that is 30:9F:FB — 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 Ardomus Networks Corporation located?

Ardomus Networks Corporation is listed at 4F,No. 6 Innovation Road II, Hsinchu Science Park Hsinchu TW 300 in the IEEE OUI registry entry for 30:9F:FB. This is the address the organization registered with the IEEE, which may differ from its current operating address.

Ardomus Networks Corporation

MAC address prefix 30:9F:FB is registered to Ardomus Networks Corporation in the IEEE OUI registry. Any device whose MAC address begins with 30:9F:FB has a network interface built by Ardomus Networks Corporation. 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 30:9F:FB:00:00:00 to 30:9F:FB:FF:FF:FF.

OUI prefix: 30:9F:FB
Hyphen form: 30-9F-FB
MAC range: 30:9F:FB:00:00:00 – 30:9F:FB:FF:FF:FF
Addresses in block: 16,777,216
Organization: Ardomus Networks Corporation
Address: 4F,No. 6 Innovation Road II, Hsinchu Science Park Hsinchu TW 300
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.

2017-09-08Assigned to "Ardomus Networks Corporation"
archived source →
2026-07-17Assigned to "Ardomus Networks Corporation"

Nearby in the registry

The prefixes assigned immediately before and after 30:9F:FB:

FAQ

Which company owns MAC address prefix 30:9F:FB?: MAC address prefix 30:9F:FB is registered to Ardomus Networks Corporation in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 30:9F:FB has a network interface built by Ardomus Networks Corporation.
What is the OUI 30:9F:FB?: 30:9F:FB is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Ardomus Networks Corporation. It covers every address from 30:9F:FB:00:00:00 to 30:9F:FB:FF:FF:FF, or 16,777,216 addresses in total. It is also written 30-9F-FB.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in 30:9F:FB:00:00:00 that is 30:9F:FB — 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 Ardomus Networks Corporation located?: Ardomus Networks Corporation is listed at 4F,No. 6 Innovation Road II, Hsinchu Science Park Hsinchu TW 300 in the IEEE OUI registry entry for 30:9F:FB. This is the address the organization registered with the IEEE, which may differ from its current operating address.