Which company owns MAC address prefix 00:15:54?

MAC address prefix 00:15:54 is registered to Atalum Wireless S.A. in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 00:15:54 has a network interface built by Atalum Wireless S.A..

What is the OUI 00:15:54?

00:15:54 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Atalum Wireless S.A.. It covers every address from 00:15:54:00:00:00 to 00:15:54:FF:FF:FF, or 16,777,216 addresses in total. It is also written 00-15-54.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in 00:15:54:00:00:00 that is 00:15:54 — 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 Atalum Wireless S.A. located?

Atalum Wireless S.A. is listed at C/ Orellana 5, 1º I Madrid ES 28004 in the IEEE OUI registry entry for 00:15:54. This is the address the organization registered with the IEEE, which may differ from its current operating address.

Atalum Wireless S.A.

MAC address prefix 00:15:54 is registered to Atalum Wireless S.A. in the IEEE OUI registry. Any device whose MAC address begins with 00:15:54 has a network interface built by Atalum Wireless S.A.. 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 00:15:54:00:00:00 to 00:15:54:FF:FF:FF.

OUI prefix: 00:15:54
Hyphen form: 00-15-54
MAC range: 00:15:54:00:00:00 – 00:15:54:FF:FF:FF
Addresses in block: 16,777,216
Organization: Atalum Wireless S.A.
Address: C/ Orellana 5, 1º I Madrid ES 28004
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 "Atalum Wireless S.A."
archived source →
2026-07-17Assigned to "Atalum Wireless S.A."

Nearby in the registry

The prefixes assigned immediately before and after 00:15:54:

FAQ

Which company owns MAC address prefix 00:15:54?: MAC address prefix 00:15:54 is registered to Atalum Wireless S.A. in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 00:15:54 has a network interface built by Atalum Wireless S.A..
What is the OUI 00:15:54?: 00:15:54 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Atalum Wireless S.A.. It covers every address from 00:15:54:00:00:00 to 00:15:54:FF:FF:FF, or 16,777,216 addresses in total. It is also written 00-15-54.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in 00:15:54:00:00:00 that is 00:15:54 — 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 Atalum Wireless S.A. located?: Atalum Wireless S.A. is listed at C/ Orellana 5, 1º I Madrid ES 28004 in the IEEE OUI registry entry for 00:15:54. This is the address the organization registered with the IEEE, which may differ from its current operating address.