Which company owns MAC address prefix 54:7A:52?

MAC address prefix 54:7A:52 is registered to CTE International srl in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 54:7A:52 has a network interface built by CTE International srl.

What is the OUI 54:7A:52?

54:7A:52 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to CTE International srl. It covers every address from 54:7A:52:00:00:00 to 54:7A:52:FF:FF:FF, or 16,777,216 addresses in total. It is also written 54-7A-52.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in 54:7A:52:00:00:00 that is 54:7A:52 — 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 CTE International srl located?

CTE International srl is listed at Via Sevardi 7 Reggio Emilia IT 42124 in the IEEE OUI registry entry for 54:7A:52. This is the address the organization registered with the IEEE, which may differ from its current operating address.

CTE International srl

MAC address prefix 54:7A:52 is registered to CTE International srl in the IEEE OUI registry. Any device whose MAC address begins with 54:7A:52 has a network interface built by CTE International srl. 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 54:7A:52:00:00:00 to 54:7A:52:FF:FF:FF.

OUI prefix: 54:7A:52
Hyphen form: 54-7A-52
MAC range: 54:7A:52:00:00:00 – 54:7A:52:FF:FF:FF
Addresses in block: 16,777,216
Organization: CTE International srl
Address: Via Sevardi 7 Reggio Emilia IT 42124
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.

2017-09-08Assigned to "CTE International srl"
archived source →
2026-07-17Assigned to "CTE International srl"

Nearby in the registry

The prefixes assigned immediately before and after 54:7A:52:

FAQ

Which company owns MAC address prefix 54:7A:52?: MAC address prefix 54:7A:52 is registered to CTE International srl in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 54:7A:52 has a network interface built by CTE International srl.
What is the OUI 54:7A:52?: 54:7A:52 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to CTE International srl. It covers every address from 54:7A:52:00:00:00 to 54:7A:52:FF:FF:FF, or 16,777,216 addresses in total. It is also written 54-7A-52.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in 54:7A:52:00:00:00 that is 54:7A:52 — 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 CTE International srl located?: CTE International srl is listed at Via Sevardi 7 Reggio Emilia IT 42124 in the IEEE OUI registry entry for 54:7A:52. This is the address the organization registered with the IEEE, which may differ from its current operating address.