Which company owns MAC address prefix 50:43:B9?

MAC address prefix 50:43:B9 is registered to OktoInform RUS in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 50:43:B9 has a network interface built by OktoInform RUS.

What is the OUI 50:43:B9?

50:43:B9 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to OktoInform RUS. It covers every address from 50:43:B9:00:00:00 to 50:43:B9:FF:FF:FF, or 16,777,216 addresses in total. It is also written 50-43-B9.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in 50:43:B9:00:00:00 that is 50:43:B9 — 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 OktoInform RUS located?

OktoInform RUS is listed at Bolshoy Tishinskiy pereulok, d. 26, korp.13-14, ofis 4R Moscow RU 123557 in the IEEE OUI registry entry for 50:43:B9. This is the address the organization registered with the IEEE, which may differ from its current operating address.

OktoInform RUS

MAC address prefix 50:43:B9 is registered to OktoInform RUS in the IEEE OUI registry. Any device whose MAC address begins with 50:43:B9 has a network interface built by OktoInform RUS. 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 50:43:B9:00:00:00 to 50:43:B9:FF:FF:FF.

OUI prefix: 50:43:B9
Hyphen form: 50-43-B9
MAC range: 50:43:B9:00:00:00 – 50:43:B9:FF:FF:FF
Addresses in block: 16,777,216
Organization: OktoInform RUS
Address: Bolshoy Tishinskiy pereulok, d. 26, korp.13-14, ofis 4R Moscow RU 123557
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.

2020-03-21Assigned to "OktoInform RUS"
archived source →
2026-07-17Assigned to "OktoInform RUS"

Nearby in the registry

The prefixes assigned immediately before and after 50:43:B9:

FAQ

Which company owns MAC address prefix 50:43:B9?: MAC address prefix 50:43:B9 is registered to OktoInform RUS in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 50:43:B9 has a network interface built by OktoInform RUS.
What is the OUI 50:43:B9?: 50:43:B9 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to OktoInform RUS. It covers every address from 50:43:B9:00:00:00 to 50:43:B9:FF:FF:FF, or 16,777,216 addresses in total. It is also written 50-43-B9.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in 50:43:B9:00:00:00 that is 50:43:B9 — 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 OktoInform RUS located?: OktoInform RUS is listed at Bolshoy Tishinskiy pereulok, d. 26, korp.13-14, ofis 4R Moscow RU 123557 in the IEEE OUI registry entry for 50:43:B9. This is the address the organization registered with the IEEE, which may differ from its current operating address.