Which company owns MAC address prefix 58:EE:CE?

MAC address prefix 58:EE:CE is registered to Icon Time Systems in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 58:EE:CE has a network interface built by Icon Time Systems.

What is the OUI 58:EE:CE?

58:EE:CE is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Icon Time Systems. It covers every address from 58:EE:CE:00:00:00 to 58:EE:CE:FF:FF:FF, or 16,777,216 addresses in total. It is also written 58-EE-CE.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in 58:EE:CE:00:00:00 that is 58:EE:CE — 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 Icon Time Systems located?

Icon Time Systems is listed at 15201 NW Greenbrier Parkway Beaverton OR US 97006 in the IEEE OUI registry entry for 58:EE:CE. This is the address the organization registered with the IEEE, which may differ from its current operating address.

Icon Time Systems

MAC address prefix 58:EE:CE is registered to Icon Time Systems in the IEEE OUI registry. Any device whose MAC address begins with 58:EE:CE has a network interface built by Icon Time Systems. 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 58:EE:CE:00:00:00 to 58:EE:CE:FF:FF:FF.

OUI prefix: 58:EE:CE
Hyphen form: 58-EE-CE
MAC range: 58:EE:CE:00:00:00 – 58:EE:CE:FF:FF:FF
Addresses in block: 16,777,216
Organization: Icon Time Systems
Address: 15201 NW Greenbrier Parkway Beaverton OR US 97006
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 "Icon Time Systems"
archived source →
2026-07-17Assigned to "Icon Time Systems"

Nearby in the registry

The prefixes assigned immediately before and after 58:EE:CE:

FAQ

Which company owns MAC address prefix 58:EE:CE?: MAC address prefix 58:EE:CE is registered to Icon Time Systems in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 58:EE:CE has a network interface built by Icon Time Systems.
What is the OUI 58:EE:CE?: 58:EE:CE is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Icon Time Systems. It covers every address from 58:EE:CE:00:00:00 to 58:EE:CE:FF:FF:FF, or 16,777,216 addresses in total. It is also written 58-EE-CE.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in 58:EE:CE:00:00:00 that is 58:EE:CE — 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 Icon Time Systems located?: Icon Time Systems is listed at 15201 NW Greenbrier Parkway Beaverton OR US 97006 in the IEEE OUI registry entry for 58:EE:CE. This is the address the organization registered with the IEEE, which may differ from its current operating address.