Which company owns MAC address prefix F4:D2:61?

MAC address prefix F4:D2:61 is registered to SEMOCON Co., Ltd in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with F4:D2:61 has a network interface built by SEMOCON Co., Ltd.

What is the OUI F4:D2:61?

F4:D2:61 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to SEMOCON Co., Ltd. It covers every address from F4:D2:61:00:00:00 to F4:D2:61:FF:FF:FF, or 16,777,216 addresses in total. It is also written F4-D2-61.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in F4:D2:61:00:00:00 that is F4:D2:61 — 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 SEMOCON Co., Ltd located?

SEMOCON Co., Ltd is listed at B-19F, Gunpo IT Valley, Dangjeong-dong, 17, Gosan-ro 148beon-gil, Gunpo-si Gyeonggi-do KR 435-833 in the IEEE OUI registry entry for F4:D2:61. This is the address the organization registered with the IEEE, which may differ from its current operating address.

SEMOCON Co., Ltd

MAC address prefix F4:D2:61 is registered to SEMOCON Co., Ltd in the IEEE OUI registry. Any device whose MAC address begins with F4:D2:61 has a network interface built by SEMOCON 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 F4:D2:61:00:00:00 to F4:D2:61:FF:FF:FF.

OUI prefix: F4:D2:61
Hyphen form: F4-D2-61
MAC range: F4:D2:61:00:00:00 – F4:D2:61:FF:FF:FF
Addresses in block: 16,777,216
Organization: SEMOCON Co., Ltd
Address: B-19F, Gunpo IT Valley, Dangjeong-dong, 17, Gosan-ro 148beon-gil, Gunpo-si Gyeonggi-do KR 435-833
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 "SEMOCON Co., Ltd"
archived source →
2026-07-17Assigned to "SEMOCON Co., Ltd"

Nearby in the registry

The prefixes assigned immediately before and after F4:D2:61:

FAQ

Which company owns MAC address prefix F4:D2:61?: MAC address prefix F4:D2:61 is registered to SEMOCON Co., Ltd in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with F4:D2:61 has a network interface built by SEMOCON Co., Ltd.
What is the OUI F4:D2:61?: F4:D2:61 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to SEMOCON Co., Ltd. It covers every address from F4:D2:61:00:00:00 to F4:D2:61:FF:FF:FF, or 16,777,216 addresses in total. It is also written F4-D2-61.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in F4:D2:61:00:00:00 that is F4:D2:61 — 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 SEMOCON Co., Ltd located?: SEMOCON Co., Ltd is listed at B-19F, Gunpo IT Valley, Dangjeong-dong, 17, Gosan-ro 148beon-gil, Gunpo-si Gyeonggi-do KR 435-833 in the IEEE OUI registry entry for F4:D2:61. This is the address the organization registered with the IEEE, which may differ from its current operating address.