Which company owns MAC address prefix B4:E5:4C?

MAC address prefix B4:E5:4C is registered to LLC "Elektra" in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with B4:E5:4C has a network interface built by LLC "Elektra".

What is the OUI B4:E5:4C?

B4:E5:4C is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to LLC "Elektra". It covers every address from B4:E5:4C:00:00:00 to B4:E5:4C:FF:FF:FF, or 16,777,216 addresses in total. It is also written B4-E5-4C.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in B4:E5:4C:00:00:00 that is B4:E5:4C — 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 LLC "Elektra" located?

LLC "Elektra" is listed at Russian Federation, Moscow, Goncharnaya st, house ? 30, building 1, office ?511 Moscow RU 115172 in the IEEE OUI registry entry for B4:E5:4C. This is the address the organization registered with the IEEE, which may differ from its current operating address.

LLC "Elektra"

MAC address prefix B4:E5:4C is registered to LLC "Elektra" in the IEEE OUI registry. Any device whose MAC address begins with B4:E5:4C has a network interface built by LLC "Elektra". 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:E5:4C:00:00:00 to B4:E5:4C:FF:FF:FF.

OUI prefix: B4:E5:4C
Hyphen form: B4-E5-4C
MAC range: B4:E5:4C:00:00:00 – B4:E5:4C:FF:FF:FF
Addresses in block: 16,777,216
Organization: LLC "Elektra"
Address: Russian Federation, Moscow, Goncharnaya st, house ? 30, building 1, office ?511 Moscow RU 115172
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.

2023-07-11Assigned to "LLC "Elektra""
archived source →
2026-07-17Assigned to "LLC "Elektra""

Nearby in the registry

The prefixes assigned immediately before and after B4:E5:4C:

FAQ

Which company owns MAC address prefix B4:E5:4C?: MAC address prefix B4:E5:4C is registered to LLC "Elektra" in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with B4:E5:4C has a network interface built by LLC "Elektra".
What is the OUI B4:E5:4C?: B4:E5:4C is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to LLC "Elektra". It covers every address from B4:E5:4C:00:00:00 to B4:E5:4C:FF:FF:FF, or 16,777,216 addresses in total. It is also written B4-E5-4C.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in B4:E5:4C:00:00:00 that is B4:E5:4C — 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 LLC "Elektra" located?: LLC "Elektra" is listed at Russian Federation, Moscow, Goncharnaya st, house ? 30, building 1, office ?511 Moscow RU 115172 in the IEEE OUI registry entry for B4:E5:4C. This is the address the organization registered with the IEEE, which may differ from its current operating address.