Which company owns MAC address prefix A0:1C:05?

MAC address prefix A0:1C:05 is registered to NIMAX TELECOM CO.,LTD. in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with A0:1C:05 has a network interface built by NIMAX TELECOM CO.,LTD..

What is the OUI A0:1C:05?

A0:1C:05 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to NIMAX TELECOM CO.,LTD.. It covers every address from A0:1C:05:00:00:00 to A0:1C:05:FF:FF:FF, or 16,777,216 addresses in total. It is also written A0-1C-05.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in A0:1C:05:00:00:00 that is A0:1C:05 — 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 NIMAX TELECOM CO.,LTD. located?

NIMAX TELECOM CO.,LTD. is listed at 1F. NO.308-7,SEC.1,DATONG RD NEW TAIPEI CITY TW 221 in the IEEE OUI registry entry for A0:1C:05. This is the address the organization registered with the IEEE, which may differ from its current operating address.

NIMAX TELECOM CO.,LTD.

MAC address prefix A0:1C:05 is registered to NIMAX TELECOM CO.,LTD. in the IEEE OUI registry. Any device whose MAC address begins with A0:1C:05 has a network interface built by NIMAX TELECOM 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 A0:1C:05:00:00:00 to A0:1C:05:FF:FF:FF.

OUI prefix: A0:1C:05
Hyphen form: A0-1C-05
MAC range: A0:1C:05:00:00:00 – A0:1C:05:FF:FF:FF
Addresses in block: 16,777,216
Organization: NIMAX TELECOM CO.,LTD.
Address: 1F. NO.308-7,SEC.1,DATONG RD NEW TAIPEI CITY TW 221
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 "NIMAX TELECOM CO.,LTD."
archived source →
2026-07-17Assigned to "NIMAX TELECOM CO.,LTD."

Nearby in the registry

The prefixes assigned immediately before and after A0:1C:05:

FAQ

Which company owns MAC address prefix A0:1C:05?: MAC address prefix A0:1C:05 is registered to NIMAX TELECOM CO.,LTD. in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with A0:1C:05 has a network interface built by NIMAX TELECOM CO.,LTD..
What is the OUI A0:1C:05?: A0:1C:05 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to NIMAX TELECOM CO.,LTD.. It covers every address from A0:1C:05:00:00:00 to A0:1C:05:FF:FF:FF, or 16,777,216 addresses in total. It is also written A0-1C-05.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in A0:1C:05:00:00:00 that is A0:1C:05 — 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 NIMAX TELECOM CO.,LTD. located?: NIMAX TELECOM CO.,LTD. is listed at 1F. NO.308-7,SEC.1,DATONG RD NEW TAIPEI CITY TW 221 in the IEEE OUI registry entry for A0:1C:05. This is the address the organization registered with the IEEE, which may differ from its current operating address.