Which company owns MAC address prefix 02:AA:3C?

MAC address prefix 02:AA:3C is registered to OLIVETTI TELECOMM SPA (OLTECO) in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 02:AA:3C has a network interface built by OLIVETTI TELECOMM SPA (OLTECO).

What is the OUI 02:AA:3C?

02:AA:3C is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to OLIVETTI TELECOMM SPA (OLTECO). It covers every address from 02:AA:3C:00:00:00 to 02:AA:3C:FF:FF:FF, or 16,777,216 addresses in total. It is also written 02-AA-3C.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in 02:AA:3C:00:00:00 that is 02:AA:3C — 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 OLIVETTI TELECOMM SPA (OLTECO) located?

OLIVETTI TELECOMM SPA (OLTECO) is listed at 20300 STEVENS CREEK BLVD. CUPERTINO CA US 95014 in the IEEE OUI registry entry for 02:AA:3C. This is the address the organization registered with the IEEE, which may differ from its current operating address.

OLIVETTI TELECOMM SPA (OLTECO)

MAC address prefix 02:AA:3C is registered to OLIVETTI TELECOMM SPA (OLTECO) in the IEEE OUI registry. Any device whose MAC address begins with 02:AA:3C has a network interface built by OLIVETTI TELECOMM SPA (OLTECO). 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 02:AA:3C:00:00:00 to 02:AA:3C:FF:FF:FF.

OUI prefix: 02:AA:3C
Hyphen form: 02-AA-3C
MAC range: 02:AA:3C:00:00:00 – 02:AA:3C:FF:FF:FF
Addresses in block: 16,777,216
Organization: OLIVETTI TELECOMM SPA (OLTECO)
Address: 20300 STEVENS CREEK BLVD. CUPERTINO CA US 95014
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 "OLIVETTI TELECOMM SPA (OLTECO)"
archived source →
2026-07-17Assigned to "OLIVETTI TELECOMM SPA (OLTECO)"

Nearby in the registry

The prefixes assigned immediately before and after 02:AA:3C:

FAQ

Which company owns MAC address prefix 02:AA:3C?: MAC address prefix 02:AA:3C is registered to OLIVETTI TELECOMM SPA (OLTECO) in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 02:AA:3C has a network interface built by OLIVETTI TELECOMM SPA (OLTECO).
What is the OUI 02:AA:3C?: 02:AA:3C is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to OLIVETTI TELECOMM SPA (OLTECO). It covers every address from 02:AA:3C:00:00:00 to 02:AA:3C:FF:FF:FF, or 16,777,216 addresses in total. It is also written 02-AA-3C.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in 02:AA:3C:00:00:00 that is 02:AA:3C — 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 OLIVETTI TELECOMM SPA (OLTECO) located?: OLIVETTI TELECOMM SPA (OLTECO) is listed at 20300 STEVENS CREEK BLVD. CUPERTINO CA US 95014 in the IEEE OUI registry entry for 02:AA:3C. This is the address the organization registered with the IEEE, which may differ from its current operating address.