Which company owns MAC address prefix 20:50:0F?

MAC address prefix 20:50:0F is registered to Fiber Groep B.V. in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 20:50:0F has a network interface built by Fiber Groep B.V..

What is the OUI 20:50:0F?

20:50:0F is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Fiber Groep B.V.. It covers every address from 20:50:0F:00:00:00 to 20:50:0F:FF:FF:FF, or 16,777,216 addresses in total. It is also written 20-50-0F.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in 20:50:0F:00:00:00 that is 20:50:0F — 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 Fiber Groep B.V. located?

Fiber Groep B.V. is listed at Transistorstraat 7 Almere Flevoland NL 1322CJ in the IEEE OUI registry entry for 20:50:0F. This is the address the organization registered with the IEEE, which may differ from its current operating address.

Fiber Groep B.V.

MAC address prefix 20:50:0F is registered to Fiber Groep B.V. in the IEEE OUI registry. Any device whose MAC address begins with 20:50:0F has a network interface built by Fiber Groep B.V.. 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 20:50:0F:00:00:00 to 20:50:0F:FF:FF:FF.

OUI prefix: 20:50:0F
Hyphen form: 20-50-0F
MAC range: 20:50:0F:00:00:00 – 20:50:0F:FF:FF:FF
Addresses in block: 16,777,216
Organization: Fiber Groep B.V.
Address: Transistorstraat 7 Almere Flevoland NL 1322CJ
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.

2024-02-15Assigned to "Fiber Groep B.V."
archived source →
2026-07-17Assigned to "Fiber Groep B.V."

Nearby in the registry

The prefixes assigned immediately before and after 20:50:0F:

FAQ

Which company owns MAC address prefix 20:50:0F?: MAC address prefix 20:50:0F is registered to Fiber Groep B.V. in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 20:50:0F has a network interface built by Fiber Groep B.V..
What is the OUI 20:50:0F?: 20:50:0F is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Fiber Groep B.V.. It covers every address from 20:50:0F:00:00:00 to 20:50:0F:FF:FF:FF, or 16,777,216 addresses in total. It is also written 20-50-0F.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in 20:50:0F:00:00:00 that is 20:50:0F — 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 Fiber Groep B.V. located?: Fiber Groep B.V. is listed at Transistorstraat 7 Almere Flevoland NL 1322CJ in the IEEE OUI registry entry for 20:50:0F. This is the address the organization registered with the IEEE, which may differ from its current operating address.