Which company owns MAC address prefix 3C:D1:C9?

MAC address prefix 3C:D1:C9 is registered to Groupe SEB in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 3C:D1:C9 has a network interface built by Groupe SEB.

What is the OUI 3C:D1:C9?

3C:D1:C9 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Groupe SEB. It covers every address from 3C:D1:C9:00:00:00 to 3C:D1:C9:FF:FF:FF, or 16,777,216 addresses in total. It is also written 3C-D1-C9.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in 3C:D1:C9:00:00:00 that is 3C:D1:C9 — 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 Groupe SEB located?

Groupe SEB is listed at Z.i. "la Capelle" Rue Léon Jouhaux Bp 10514 Saint Lo Select State FR 50004 in the IEEE OUI registry entry for 3C:D1:C9. This is the address the organization registered with the IEEE, which may differ from its current operating address.

Groupe SEB

MAC address prefix 3C:D1:C9 is registered to Groupe SEB in the IEEE OUI registry. Any device whose MAC address begins with 3C:D1:C9 has a network interface built by Groupe SEB. 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 3C:D1:C9:00:00:00 to 3C:D1:C9:FF:FF:FF.

OUI prefix: 3C:D1:C9
Hyphen form: 3C-D1-C9
MAC range: 3C:D1:C9:00:00:00 – 3C:D1:C9:FF:FF:FF
Addresses in block: 16,777,216
Organization: Groupe SEB
Address: Z.i. "la Capelle" Rue Léon Jouhaux Bp 10514 Saint Lo Select State FR 50004
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.

2024-06-23Assigned to "Groupe SEB"
archived source →
2026-07-17Assigned to "Groupe SEB"

Nearby in the registry

The prefixes assigned immediately before and after 3C:D1:C9:

FAQ

Which company owns MAC address prefix 3C:D1:C9?: MAC address prefix 3C:D1:C9 is registered to Groupe SEB in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 3C:D1:C9 has a network interface built by Groupe SEB.
What is the OUI 3C:D1:C9?: 3C:D1:C9 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Groupe SEB. It covers every address from 3C:D1:C9:00:00:00 to 3C:D1:C9:FF:FF:FF, or 16,777,216 addresses in total. It is also written 3C-D1-C9.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in 3C:D1:C9:00:00:00 that is 3C:D1:C9 — 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 Groupe SEB located?: Groupe SEB is listed at Z.i. "la Capelle" Rue Léon Jouhaux Bp 10514 Saint Lo Select State FR 50004 in the IEEE OUI registry entry for 3C:D1:C9. This is the address the organization registered with the IEEE, which may differ from its current operating address.