Which company owns MAC address prefix 38:9F:5A?

MAC address prefix 38:9F:5A is registered to C-Kur TV Inc. in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 38:9F:5A has a network interface built by C-Kur TV Inc..

What is the OUI 38:9F:5A?

38:9F:5A is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to C-Kur TV Inc.. It covers every address from 38:9F:5A:00:00:00 to 38:9F:5A:FF:FF:FF, or 16,777,216 addresses in total. It is also written 38-9F-5A.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in 38:9F:5A:00:00:00 that is 38:9F:5A — 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 C-Kur TV Inc. located?

C-Kur TV Inc. is listed at A-1902, 583, Yangcheon-ro, Gangseo-gu Seoul KR 07547 in the IEEE OUI registry entry for 38:9F:5A. This is the address the organization registered with the IEEE, which may differ from its current operating address.

C-Kur TV Inc.

MAC address prefix 38:9F:5A is registered to C-Kur TV Inc. in the IEEE OUI registry. Any device whose MAC address begins with 38:9F:5A has a network interface built by C-Kur TV 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 38:9F:5A:00:00:00 to 38:9F:5A:FF:FF:FF.

OUI prefix: 38:9F:5A
Hyphen form: 38-9F-5A
MAC range: 38:9F:5A:00:00:00 – 38:9F:5A:FF:FF:FF
Addresses in block: 16,777,216
Organization: C-Kur TV Inc.
Address: A-1902, 583, Yangcheon-ro, Gangseo-gu Seoul KR 07547
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 "C-Kur TV Inc."
archived source →
2026-07-17Assigned to "C-Kur TV Inc."

Nearby in the registry

The prefixes assigned immediately before and after 38:9F:5A:

FAQ

Which company owns MAC address prefix 38:9F:5A?: MAC address prefix 38:9F:5A is registered to C-Kur TV Inc. in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 38:9F:5A has a network interface built by C-Kur TV Inc..
What is the OUI 38:9F:5A?: 38:9F:5A is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to C-Kur TV Inc.. It covers every address from 38:9F:5A:00:00:00 to 38:9F:5A:FF:FF:FF, or 16,777,216 addresses in total. It is also written 38-9F-5A.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in 38:9F:5A:00:00:00 that is 38:9F:5A — 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 C-Kur TV Inc. located?: C-Kur TV Inc. is listed at A-1902, 583, Yangcheon-ro, Gangseo-gu Seoul KR 07547 in the IEEE OUI registry entry for 38:9F:5A. This is the address the organization registered with the IEEE, which may differ from its current operating address.