Which company owns MAC address prefix 04:D1:90?

MAC address prefix 04:D1:90 is registered to Kaon Group Co., Ltd. in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 04:D1:90 has a network interface built by Kaon Group Co., Ltd..

What is the OUI 04:D1:90?

04:D1:90 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Kaon Group Co., Ltd.. It covers every address from 04:D1:90:00:00:00 to 04:D1:90:FF:FF:FF, or 16,777,216 addresses in total. It is also written 04-D1-90.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in 04:D1:90:00:00:00 that is 04:D1:90 — 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 Kaon Group Co., Ltd. located?

Kaon Group Co., Ltd. is listed at 884-3, Seongnam-daero, Bundang-gu Seongnam-si Gyeonggi-do KR 13517 in the IEEE OUI registry entry for 04:D1:90. This is the address the organization registered with the IEEE, which may differ from its current operating address.

How many MAC prefixes does Kaon Group Co., Ltd. own?

Kaon Group Co., Ltd. holds 13 OUI prefixes in the IEEE registry, of which 04:D1:90 is one. A device made by Kaon Group Co., Ltd. could carry a MAC address from any of them.

Kaon Group Co., Ltd.

MAC address prefix 04:D1:90 is registered to Kaon Group Co., Ltd. in the IEEE OUI registry. Any device whose MAC address begins with 04:D1:90 has a network interface built by Kaon Group 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:D1:90:00:00:00 to 04:D1:90:FF:FF:FF.

OUI prefix: 04:D1:90
Hyphen form: 04-D1-90
MAC range: 04:D1:90:00:00:00 – 04:D1:90:FF:FF:FF
Addresses in block: 16,777,216
Organization: Kaon Group Co., Ltd.
Address: 884-3, Seongnam-daero, Bundang-gu Seongnam-si Gyeonggi-do KR 13517
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.

Other prefixes from Kaon Group Co., Ltd.

Kaon Group Co., Ltd. holds 13 OUI prefixes in total. A device with this exact prefix could just as well carry any of these:

Assignment history (2)

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

2025-05-13Assigned to "Kaon Group Co., Ltd."
archived source →
2026-07-17Assigned to "Kaon Group Co., Ltd."

Nearby in the registry

The prefixes assigned immediately before and after 04:D1:90:

FAQ

Which company owns MAC address prefix 04:D1:90?: MAC address prefix 04:D1:90 is registered to Kaon Group Co., Ltd. in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 04:D1:90 has a network interface built by Kaon Group Co., Ltd..
What is the OUI 04:D1:90?: 04:D1:90 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Kaon Group Co., Ltd.. It covers every address from 04:D1:90:00:00:00 to 04:D1:90:FF:FF:FF, or 16,777,216 addresses in total. It is also written 04-D1-90.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in 04:D1:90:00:00:00 that is 04:D1:90 — 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 Kaon Group Co., Ltd. located?: Kaon Group Co., Ltd. is listed at 884-3, Seongnam-daero, Bundang-gu Seongnam-si Gyeonggi-do KR 13517 in the IEEE OUI registry entry for 04:D1:90. This is the address the organization registered with the IEEE, which may differ from its current operating address.
How many MAC prefixes does Kaon Group Co., Ltd. own?: Kaon Group Co., Ltd. holds 13 OUI prefixes in the IEEE registry, of which 04:D1:90 is one. A device made by Kaon Group Co., Ltd. could carry a MAC address from any of them.