Which company owns MAC address prefix B4:E0:1D?

MAC address prefix B4:E0:1D is registered to CONCEPTION ELECTRONIQUE in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with B4:E0:1D has a network interface built by CONCEPTION ELECTRONIQUE.

What is the OUI B4:E0:1D?

B4:E0:1D is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to CONCEPTION ELECTRONIQUE. It covers every address from B4:E0:1D:00:00:00 to B4:E0:1D:FF:FF:FF, or 16,777,216 addresses in total. It is also written B4-E0-1D.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in B4:E0:1D:00:00:00 that is B4:E0:1D — 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 CONCEPTION ELECTRONIQUE located?

CONCEPTION ELECTRONIQUE is listed at 3 boulevard de l'europe NEUFCHATEL EN BRAY FR 76270 in the IEEE OUI registry entry for B4:E0:1D. This is the address the organization registered with the IEEE, which may differ from its current operating address.

CONCEPTION ELECTRONIQUE

MAC address prefix B4:E0:1D is registered to CONCEPTION ELECTRONIQUE in the IEEE OUI registry. Any device whose MAC address begins with B4:E0:1D has a network interface built by CONCEPTION ELECTRONIQUE. 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 B4:E0:1D:00:00:00 to B4:E0:1D:FF:FF:FF.

OUI prefix: B4:E0:1D
Hyphen form: B4-E0-1D
MAC range: B4:E0:1D:00:00:00 – B4:E0:1D:FF:FF:FF
Addresses in block: 16,777,216
Organization: CONCEPTION ELECTRONIQUE
Address: 3 boulevard de l'europe NEUFCHATEL EN BRAY FR 76270
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.

2018-12-21Assigned to "CONCEPTION ELECTRONIQUE"
archived source →
2026-07-17Assigned to "CONCEPTION ELECTRONIQUE"

Nearby in the registry

The prefixes assigned immediately before and after B4:E0:1D:

FAQ

Which company owns MAC address prefix B4:E0:1D?: MAC address prefix B4:E0:1D is registered to CONCEPTION ELECTRONIQUE in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with B4:E0:1D has a network interface built by CONCEPTION ELECTRONIQUE.
What is the OUI B4:E0:1D?: B4:E0:1D is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to CONCEPTION ELECTRONIQUE. It covers every address from B4:E0:1D:00:00:00 to B4:E0:1D:FF:FF:FF, or 16,777,216 addresses in total. It is also written B4-E0-1D.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in B4:E0:1D:00:00:00 that is B4:E0:1D — 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 CONCEPTION ELECTRONIQUE located?: CONCEPTION ELECTRONIQUE is listed at 3 boulevard de l'europe NEUFCHATEL EN BRAY FR 76270 in the IEEE OUI registry entry for B4:E0:1D. This is the address the organization registered with the IEEE, which may differ from its current operating address.