Which company owns MAC address prefix 04:F9:D9?

MAC address prefix 04:F9:D9 is registered to Speaker Electronic(Jiashan) Co.,Ltd in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 04:F9:D9 has a network interface built by Speaker Electronic(Jiashan) Co.,Ltd.

What is the OUI 04:F9:D9?

04:F9:D9 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Speaker Electronic(Jiashan) Co.,Ltd. It covers every address from 04:F9:D9:00:00:00 to 04:F9:D9:FF:FF:FF, or 16,777,216 addresses in total. It is also written 04-F9-D9.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in 04:F9:D9:00:00:00 that is 04:F9:D9 — 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 Speaker Electronic(Jiashan) Co.,Ltd located?

Speaker Electronic(Jiashan) Co.,Ltd is listed at No. 8 Development Zone Road, Huimin Sub-district Jiashan Zhejiang CN 314112 in the IEEE OUI registry entry for 04:F9:D9. This is the address the organization registered with the IEEE, which may differ from its current operating address.

Speaker Electronic(Jiashan) Co.,Ltd

MAC address prefix 04:F9:D9 is registered to Speaker Electronic(Jiashan) Co.,Ltd in the IEEE OUI registry. Any device whose MAC address begins with 04:F9:D9 has a network interface built by Speaker Electronic(Jiashan) Co.,Ltd. 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 04:F9:D9:00:00:00 to 04:F9:D9:FF:FF:FF.

OUI prefix: 04:F9:D9
Hyphen form: 04-F9-D9
MAC range: 04:F9:D9:00:00:00 – 04:F9:D9:FF:FF:FF
Addresses in block: 16,777,216
Organization: Speaker Electronic(Jiashan) Co.,Ltd
Address: No. 8 Development Zone Road, Huimin Sub-district Jiashan Zhejiang CN 314112
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.

2018-12-21Assigned to "Speaker Electronic(Jiashan) Co.,Ltd"
archived source →
2026-07-17Assigned to "Speaker Electronic(Jiashan) Co.,Ltd"

Nearby in the registry

The prefixes assigned immediately before and after 04:F9:D9:

FAQ

Which company owns MAC address prefix 04:F9:D9?: MAC address prefix 04:F9:D9 is registered to Speaker Electronic(Jiashan) Co.,Ltd in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 04:F9:D9 has a network interface built by Speaker Electronic(Jiashan) Co.,Ltd.
What is the OUI 04:F9:D9?: 04:F9:D9 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Speaker Electronic(Jiashan) Co.,Ltd. It covers every address from 04:F9:D9:00:00:00 to 04:F9:D9:FF:FF:FF, or 16,777,216 addresses in total. It is also written 04-F9-D9.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in 04:F9:D9:00:00:00 that is 04:F9:D9 — 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 Speaker Electronic(Jiashan) Co.,Ltd located?: Speaker Electronic(Jiashan) Co.,Ltd is listed at No. 8 Development Zone Road, Huimin Sub-district Jiashan Zhejiang CN 314112 in the IEEE OUI registry entry for 04:F9:D9. This is the address the organization registered with the IEEE, which may differ from its current operating address.