Which company owns MAC address prefix 58:49:25?

MAC address prefix 58:49:25 is registered to E3 Enterprise in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 58:49:25 has a network interface built by E3 Enterprise.

What is the OUI 58:49:25?

58:49:25 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to E3 Enterprise. It covers every address from 58:49:25:00:00:00 to 58:49:25:FF:FF:FF, or 16,777,216 addresses in total. It is also written 58-49-25.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in 58:49:25:00:00:00 that is 58:49:25 — 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 E3 Enterprise located?

E3 Enterprise is listed at 32F, Shinjuku Nomura Building Tokyo JP 163-0532 in the IEEE OUI registry entry for 58:49:25. This is the address the organization registered with the IEEE, which may differ from its current operating address.

E3 Enterprise

MAC address prefix 58:49:25 is registered to E3 Enterprise in the IEEE OUI registry. Any device whose MAC address begins with 58:49:25 has a network interface built by E3 Enterprise. 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 58:49:25:00:00:00 to 58:49:25:FF:FF:FF.

OUI prefix: 58:49:25
Hyphen form: 58-49-25
MAC range: 58:49:25:00:00:00 – 58:49:25:FF:FF:FF
Addresses in block: 16,777,216
Organization: E3 Enterprise
Address: 32F, Shinjuku Nomura Building Tokyo JP 163-0532
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 "E3 Enterprise"
archived source →
2026-07-17Assigned to "E3 Enterprise"

Nearby in the registry

The prefixes assigned immediately before and after 58:49:25:

FAQ

Which company owns MAC address prefix 58:49:25?: MAC address prefix 58:49:25 is registered to E3 Enterprise in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 58:49:25 has a network interface built by E3 Enterprise.
What is the OUI 58:49:25?: 58:49:25 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to E3 Enterprise. It covers every address from 58:49:25:00:00:00 to 58:49:25:FF:FF:FF, or 16,777,216 addresses in total. It is also written 58-49-25.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in 58:49:25:00:00:00 that is 58:49:25 — 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 E3 Enterprise located?: E3 Enterprise is listed at 32F, Shinjuku Nomura Building Tokyo JP 163-0532 in the IEEE OUI registry entry for 58:49:25. This is the address the organization registered with the IEEE, which may differ from its current operating address.