Which company owns MAC address prefix A4:E3:2E?

MAC address prefix A4:E3:2E is registered to Silicon & Software Systems Ltd. in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with A4:E3:2E has a network interface built by Silicon & Software Systems Ltd..

What is the OUI A4:E3:2E?

A4:E3:2E is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Silicon & Software Systems Ltd.. It covers every address from A4:E3:2E:00:00:00 to A4:E3:2E:FF:FF:FF, or 16,777,216 addresses in total. It is also written A4-E3-2E.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in A4:E3:2E:00:00:00 that is A4:E3:2E — 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 Silicon & Software Systems Ltd. located?

Silicon & Software Systems Ltd. is listed at South County Business Park Leopardstown Dublin IE 18 in the IEEE OUI registry entry for A4:E3:2E. This is the address the organization registered with the IEEE, which may differ from its current operating address.

Silicon & Software Systems Ltd.

MAC address prefix A4:E3:2E is registered to Silicon & Software Systems Ltd. in the IEEE OUI registry. Any device whose MAC address begins with A4:E3:2E has a network interface built by Silicon & Software Systems 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 A4:E3:2E:00:00:00 to A4:E3:2E:FF:FF:FF.

OUI prefix: A4:E3:2E
Hyphen form: A4-E3-2E
MAC range: A4:E3:2E:00:00:00 – A4:E3:2E:FF:FF:FF
Addresses in block: 16,777,216
Organization: Silicon & Software Systems Ltd.
Address: South County Business Park Leopardstown Dublin IE 18
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 "Silicon & Software Systems Ltd."
archived source →
2026-07-17Assigned to "Silicon & Software Systems Ltd."

Nearby in the registry

The prefixes assigned immediately before and after A4:E3:2E:

FAQ

Which company owns MAC address prefix A4:E3:2E?: MAC address prefix A4:E3:2E is registered to Silicon & Software Systems Ltd. in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with A4:E3:2E has a network interface built by Silicon & Software Systems Ltd..
What is the OUI A4:E3:2E?: A4:E3:2E is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Silicon & Software Systems Ltd.. It covers every address from A4:E3:2E:00:00:00 to A4:E3:2E:FF:FF:FF, or 16,777,216 addresses in total. It is also written A4-E3-2E.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in A4:E3:2E:00:00:00 that is A4:E3:2E — 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 Silicon & Software Systems Ltd. located?: Silicon & Software Systems Ltd. is listed at South County Business Park Leopardstown Dublin IE 18 in the IEEE OUI registry entry for A4:E3:2E. This is the address the organization registered with the IEEE, which may differ from its current operating address.