Which company owns MAC address prefix D8:81:CE?

MAC address prefix D8:81:CE is registered to AHN INC. in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with D8:81:CE has a network interface built by AHN INC..

What is the OUI D8:81:CE?

D8:81:CE is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to AHN INC.. It covers every address from D8:81:CE:00:00:00 to D8:81:CE:FF:FF:FF, or 16,777,216 addresses in total. It is also written D8-81-CE.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in D8:81:CE:00:00:00 that is D8:81: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 AHN INC. located?

AHN INC. is listed at 1006,Halla sigma valley, 53, Gasandigital 2-Ro Seoul KR 153 706 in the IEEE OUI registry entry for D8:81:CE. This is the address the organization registered with the IEEE, which may differ from its current operating address.

AHN INC.

MAC address prefix D8:81:CE is registered to AHN INC. in the IEEE OUI registry. Any device whose MAC address begins with D8:81:CE has a network interface built by AHN 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 D8:81:CE:00:00:00 to D8:81:CE:FF:FF:FF.

OUI prefix: D8:81:CE
Hyphen form: D8-81-CE
MAC range: D8:81:CE:00:00:00 – D8:81:CE:FF:FF:FF
Addresses in block: 16,777,216
Organization: AHN INC.
Address: 1006,Halla sigma valley, 53, Gasandigital 2-Ro Seoul KR 153 706
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 "AHN INC."
archived source →
2026-07-17Assigned to "AHN INC."

Nearby in the registry

The prefixes assigned immediately before and after D8:81:CE:

FAQ

Which company owns MAC address prefix D8:81:CE?: MAC address prefix D8:81:CE is registered to AHN INC. in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with D8:81:CE has a network interface built by AHN INC..
What is the OUI D8:81:CE?: D8:81:CE is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to AHN INC.. It covers every address from D8:81:CE:00:00:00 to D8:81:CE:FF:FF:FF, or 16,777,216 addresses in total. It is also written D8-81-CE.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in D8:81:CE:00:00:00 that is D8:81: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 AHN INC. located?: AHN INC. is listed at 1006,Halla sigma valley, 53, Gasandigital 2-Ro Seoul KR 153 706 in the IEEE OUI registry entry for D8:81:CE. This is the address the organization registered with the IEEE, which may differ from its current operating address.