Which company owns MAC address prefix 04:E1:C8?

MAC address prefix 04:E1:C8 is registered to IMS Soluções em Energia Ltda. in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 04:E1:C8 has a network interface built by IMS Soluções em Energia Ltda..

What is the OUI 04:E1:C8?

04:E1:C8 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to IMS Soluções em Energia Ltda.. It covers every address from 04:E1:C8:00:00:00 to 04:E1:C8:FF:FF:FF, or 16,777,216 addresses in total. It is also written 04-E1-C8.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in 04:E1:C8:00:00:00 that is 04:E1:C8 — 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 IMS Soluções em Energia Ltda. located?

IMS Soluções em Energia Ltda. is listed at Av. Bernardino Silveira Pastoriza, 720 Porto Alegre RS BR 91160-310 in the IEEE OUI registry entry for 04:E1:C8. This is the address the organization registered with the IEEE, which may differ from its current operating address.

IMS Soluções em Energia Ltda.

MAC address prefix 04:E1:C8 is registered to IMS Soluções em Energia Ltda. in the IEEE OUI registry. Any device whose MAC address begins with 04:E1:C8 has a network interface built by IMS Soluções em Energia Ltda.. 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 04:E1:C8:00:00:00 to 04:E1:C8:FF:FF:FF.

OUI prefix: 04:E1:C8
Hyphen form: 04-E1-C8
MAC range: 04:E1:C8:00:00:00 – 04:E1:C8:FF:FF:FF
Addresses in block: 16,777,216
Organization: IMS Soluções em Energia Ltda.
Address: Av. Bernardino Silveira Pastoriza, 720 Porto Alegre RS BR 91160-310
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 "IMS Soluções em Energia Ltda."
archived source →
2026-07-17Assigned to "IMS Soluções em Energia Ltda."

Nearby in the registry

The prefixes assigned immediately before and after 04:E1:C8:

FAQ

Which company owns MAC address prefix 04:E1:C8?: MAC address prefix 04:E1:C8 is registered to IMS Soluções em Energia Ltda. in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 04:E1:C8 has a network interface built by IMS Soluções em Energia Ltda..
What is the OUI 04:E1:C8?: 04:E1:C8 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to IMS Soluções em Energia Ltda.. It covers every address from 04:E1:C8:00:00:00 to 04:E1:C8:FF:FF:FF, or 16,777,216 addresses in total. It is also written 04-E1-C8.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in 04:E1:C8:00:00:00 that is 04:E1:C8 — 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 IMS Soluções em Energia Ltda. located?: IMS Soluções em Energia Ltda. is listed at Av. Bernardino Silveira Pastoriza, 720 Porto Alegre RS BR 91160-310 in the IEEE OUI registry entry for 04:E1:C8. This is the address the organization registered with the IEEE, which may differ from its current operating address.