Which company owns MAC address prefix F4:1F:0B?

MAC address prefix F4:1F:0B is registered to YAMABISHI Corporation in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with F4:1F:0B has a network interface built by YAMABISHI Corporation.

What is the OUI F4:1F:0B?

F4:1F:0B is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to YAMABISHI Corporation. It covers every address from F4:1F:0B:00:00:00 to F4:1F:0B:FF:FF:FF, or 16,777,216 addresses in total. It is also written F4-1F-0B.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in F4:1F:0B:00:00:00 that is F4:1F:0B — 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 YAMABISHI Corporation located?

YAMABISHI Corporation is listed at 3-14-12 Kamigou Ebina-city KANAGAWA JP 243-0434 in the IEEE OUI registry entry for F4:1F:0B. This is the address the organization registered with the IEEE, which may differ from its current operating address.

YAMABISHI Corporation

MAC address prefix F4:1F:0B is registered to YAMABISHI Corporation in the IEEE OUI registry. Any device whose MAC address begins with F4:1F:0B has a network interface built by YAMABISHI Corporation. 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 F4:1F:0B:00:00:00 to F4:1F:0B:FF:FF:FF.

OUI prefix: F4:1F:0B
Hyphen form: F4-1F-0B
MAC range: F4:1F:0B:00:00:00 – F4:1F:0B:FF:FF:FF
Addresses in block: 16,777,216
Organization: YAMABISHI Corporation
Address: 3-14-12 Kamigou Ebina-city KANAGAWA JP 243-0434
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.

2016-07-29Assigned to "YAMABISHI Corporation"
archived source →
2026-07-17Assigned to "YAMABISHI Corporation"

Nearby in the registry

The prefixes assigned immediately before and after F4:1F:0B:

FAQ

Which company owns MAC address prefix F4:1F:0B?: MAC address prefix F4:1F:0B is registered to YAMABISHI Corporation in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with F4:1F:0B has a network interface built by YAMABISHI Corporation.
What is the OUI F4:1F:0B?: F4:1F:0B is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to YAMABISHI Corporation. It covers every address from F4:1F:0B:00:00:00 to F4:1F:0B:FF:FF:FF, or 16,777,216 addresses in total. It is also written F4-1F-0B.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in F4:1F:0B:00:00:00 that is F4:1F:0B — 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 YAMABISHI Corporation located?: YAMABISHI Corporation is listed at 3-14-12 Kamigou Ebina-city KANAGAWA JP 243-0434 in the IEEE OUI registry entry for F4:1F:0B. This is the address the organization registered with the IEEE, which may differ from its current operating address.