Which company owns MAC address prefix 28:F7:9A?

MAC address prefix 28:F7:9A is registered to LX Semicon co.,Ltd. in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 28:F7:9A has a network interface built by LX Semicon co.,Ltd..

What is the OUI 28:F7:9A?

28:F7:9A is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to LX Semicon co.,Ltd.. It covers every address from 28:F7:9A:00:00:00 to 28:F7:9A:FF:FF:FF, or 16,777,216 addresses in total. It is also written 28-F7-9A.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in 28:F7:9A:00:00:00 that is 28:F7:9A — 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 LX Semicon co.,Ltd. located?

LX Semicon co.,Ltd. is listed at 222 Techno 2-ro Yuseong-gu, Daejeon - KR 34027 in the IEEE OUI registry entry for 28:F7:9A. This is the address the organization registered with the IEEE, which may differ from its current operating address.

LX Semicon co.,Ltd.

MAC address prefix 28:F7:9A is registered to LX Semicon co.,Ltd. in the IEEE OUI registry. Any device whose MAC address begins with 28:F7:9A has a network interface built by LX Semicon 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 28:F7:9A:00:00:00 to 28:F7:9A:FF:FF:FF.

OUI prefix: 28:F7:9A
Hyphen form: 28-F7-9A
MAC range: 28:F7:9A:00:00:00 – 28:F7:9A:FF:FF:FF
Addresses in block: 16,777,216
Organization: LX Semicon co.,Ltd.
Address: 222 Techno 2-ro Yuseong-gu, Daejeon - KR 34027
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 (1)

The IEEE registry publishes current state only — this is the change record we've kept since we started tracking it daily.

2026-07-17Assigned to "LX Semicon co.,Ltd."

Nearby in the registry

The prefixes assigned immediately before and after 28:F7:9A:

FAQ

Which company owns MAC address prefix 28:F7:9A?: MAC address prefix 28:F7:9A is registered to LX Semicon co.,Ltd. in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 28:F7:9A has a network interface built by LX Semicon co.,Ltd..
What is the OUI 28:F7:9A?: 28:F7:9A is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to LX Semicon co.,Ltd.. It covers every address from 28:F7:9A:00:00:00 to 28:F7:9A:FF:FF:FF, or 16,777,216 addresses in total. It is also written 28-F7-9A.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in 28:F7:9A:00:00:00 that is 28:F7:9A — 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 LX Semicon co.,Ltd. located?: LX Semicon co.,Ltd. is listed at 222 Techno 2-ro Yuseong-gu, Daejeon - KR 34027 in the IEEE OUI registry entry for 28:F7:9A. This is the address the organization registered with the IEEE, which may differ from its current operating address.