Which company owns MAC address prefix 00:04:CD?

MAC address prefix 00:04:CD is registered to Extenway Solutions Inc in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 00:04:CD has a network interface built by Extenway Solutions Inc.

What is the OUI 00:04:CD?

00:04:CD is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Extenway Solutions Inc. It covers every address from 00:04:CD:00:00:00 to 00:04:CD:FF:FF:FF, or 16,777,216 addresses in total. It is also written 00-04-CD.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in 00:04:CD:00:00:00 that is 00:04:CD — 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 Extenway Solutions Inc located?

Extenway Solutions Inc is listed at 500 boul. Morgan Baie-d'Urfe Quebec H9X 3V1 CA in the IEEE OUI registry entry for 00:04:CD. This is the address the organization registered with the IEEE, which may differ from its current operating address.

Extenway Solutions Inc

MAC address prefix 00:04:CD is registered to Extenway Solutions Inc in the IEEE OUI registry. Any device whose MAC address begins with 00:04:CD has a network interface built by Extenway Solutions Inc. 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 00:04:CD:00:00:00 to 00:04:CD:FF:FF:FF.

OUI prefix: 00:04:CD
Hyphen form: 00-04-CD
MAC range: 00:04:CD:00:00:00 – 00:04:CD:FF:FF:FF
Addresses in block: 16,777,216
Organization: Extenway Solutions Inc
Address: 500 boul. Morgan Baie-d'Urfe Quebec H9X 3V1 CA
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 "Extenway Solutions Inc"
archived source →
2026-07-17Assigned to "Extenway Solutions Inc"

Nearby in the registry

The prefixes assigned immediately before and after 00:04:CD:

FAQ

Which company owns MAC address prefix 00:04:CD?: MAC address prefix 00:04:CD is registered to Extenway Solutions Inc in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 00:04:CD has a network interface built by Extenway Solutions Inc.
What is the OUI 00:04:CD?: 00:04:CD is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Extenway Solutions Inc. It covers every address from 00:04:CD:00:00:00 to 00:04:CD:FF:FF:FF, or 16,777,216 addresses in total. It is also written 00-04-CD.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in 00:04:CD:00:00:00 that is 00:04:CD — 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 Extenway Solutions Inc located?: Extenway Solutions Inc is listed at 500 boul. Morgan Baie-d'Urfe Quebec H9X 3V1 CA in the IEEE OUI registry entry for 00:04:CD. This is the address the organization registered with the IEEE, which may differ from its current operating address.