Which company owns MAC address prefix AC:C2:EC?

MAC address prefix AC:C2:EC is registered to CLT INT'L IND. CORP. in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with AC:C2:EC has a network interface built by CLT INT'L IND. CORP..

What is the OUI AC:C2:EC?

AC:C2:EC is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to CLT INT'L IND. CORP.. It covers every address from AC:C2:EC:00:00:00 to AC:C2:EC:FF:FF:FF, or 16,777,216 addresses in total. It is also written AC-C2-EC.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in AC:C2:EC:00:00:00 that is AC:C2:EC — 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 CLT INT'L IND. CORP. located?

CLT INT'L IND. CORP. is listed at 11F-2, NO.1, ZHANQIAN MIAOLI TW 36043 in the IEEE OUI registry entry for AC:C2:EC. This is the address the organization registered with the IEEE, which may differ from its current operating address.

CLT INT'L IND. CORP.

MAC address prefix AC:C2:EC is registered to CLT INT'L IND. CORP. in the IEEE OUI registry. Any device whose MAC address begins with AC:C2:EC has a network interface built by CLT INT'L IND. CORP.. 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 AC:C2:EC:00:00:00 to AC:C2:EC:FF:FF:FF.

OUI prefix: AC:C2:EC
Hyphen form: AC-C2-EC
MAC range: AC:C2:EC:00:00:00 – AC:C2:EC:FF:FF:FF
Addresses in block: 16,777,216
Organization: CLT INT'L IND. CORP.
Address: 11F-2, NO.1, ZHANQIAN MIAOLI TW 36043
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 "CLT INT'L IND. CORP."
archived source →
2026-07-17Assigned to "CLT INT'L IND. CORP."

Nearby in the registry

The prefixes assigned immediately before and after AC:C2:EC:

FAQ

Which company owns MAC address prefix AC:C2:EC?: MAC address prefix AC:C2:EC is registered to CLT INT'L IND. CORP. in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with AC:C2:EC has a network interface built by CLT INT'L IND. CORP..
What is the OUI AC:C2:EC?: AC:C2:EC is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to CLT INT'L IND. CORP.. It covers every address from AC:C2:EC:00:00:00 to AC:C2:EC:FF:FF:FF, or 16,777,216 addresses in total. It is also written AC-C2-EC.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in AC:C2:EC:00:00:00 that is AC:C2:EC — 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 CLT INT'L IND. CORP. located?: CLT INT'L IND. CORP. is listed at 11F-2, NO.1, ZHANQIAN MIAOLI TW 36043 in the IEEE OUI registry entry for AC:C2:EC. This is the address the organization registered with the IEEE, which may differ from its current operating address.