Which company owns MAC address prefix 9C:1E:CE?

MAC address prefix 9C:1E:CE is registered to ALT Co., Ltd. in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 9C:1E:CE has a network interface built by ALT Co., Ltd..

What is the OUI 9C:1E:CE?

9C:1E:CE is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to ALT Co., Ltd.. It covers every address from 9C:1E:CE:00:00:00 to 9C:1E:CE:FF:FF:FF, or 16,777,216 addresses in total. It is also written 9C-1E-CE.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in 9C:1E:CE:00:00:00 that is 9C:1E:CE — 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 ALT Co., Ltd. located?

ALT Co., Ltd. is listed at #1201, 8, Seongnam-dearo 331beon-gil Bundang-gu, Seongnam-si Gyeonggi-do KR 13558 in the IEEE OUI registry entry for 9C:1E:CE. This is the address the organization registered with the IEEE, which may differ from its current operating address.

ALT Co., Ltd.

MAC address prefix 9C:1E:CE is registered to ALT Co., Ltd. in the IEEE OUI registry. Any device whose MAC address begins with 9C:1E:CE has a network interface built by ALT 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 9C:1E:CE:00:00:00 to 9C:1E:CE:FF:FF:FF.

OUI prefix: 9C:1E:CE
Hyphen form: 9C-1E-CE
MAC range: 9C:1E:CE:00:00:00 – 9C:1E:CE:FF:FF:FF
Addresses in block: 16,777,216
Organization: ALT Co., Ltd.
Address: #1201, 8, Seongnam-dearo 331beon-gil Bundang-gu, Seongnam-si Gyeonggi-do KR 13558
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.

2024-02-15Assigned to "ALT Co., Ltd."
archived source →
2026-07-17Assigned to "ALT Co., Ltd."

Nearby in the registry

The prefixes assigned immediately before and after 9C:1E:CE:

FAQ

Which company owns MAC address prefix 9C:1E:CE?: MAC address prefix 9C:1E:CE is registered to ALT Co., Ltd. in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 9C:1E:CE has a network interface built by ALT Co., Ltd..
What is the OUI 9C:1E:CE?: 9C:1E:CE is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to ALT Co., Ltd.. It covers every address from 9C:1E:CE:00:00:00 to 9C:1E:CE:FF:FF:FF, or 16,777,216 addresses in total. It is also written 9C-1E-CE.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in 9C:1E:CE:00:00:00 that is 9C:1E:CE — 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 ALT Co., Ltd. located?: ALT Co., Ltd. is listed at #1201, 8, Seongnam-dearo 331beon-gil Bundang-gu, Seongnam-si Gyeonggi-do KR 13558 in the IEEE OUI registry entry for 9C:1E:CE. This is the address the organization registered with the IEEE, which may differ from its current operating address.