Which company owns MAC address prefix F0:0E:BF?

MAC address prefix F0:0E:BF is registered to ZettaHash Inc. in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with F0:0E:BF has a network interface built by ZettaHash Inc..

What is the OUI F0:0E:BF?

F0:0E:BF is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to ZettaHash Inc.. It covers every address from F0:0E:BF:00:00:00 to F0:0E:BF:FF:FF:FF, or 16,777,216 addresses in total. It is also written F0-0E-BF.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in F0:0E:BF:00:00:00 that is F0:0E:BF — 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 ZettaHash Inc. located?

ZettaHash Inc. is listed at 6F Chiyoda Ogawamachi Crosta, 1-11, Kanda Ogawamachi Chiyoda-ku Tokyo JP 101-0052 in the IEEE OUI registry entry for F0:0E:BF. This is the address the organization registered with the IEEE, which may differ from its current operating address.

ZettaHash Inc.

MAC address prefix F0:0E:BF is registered to ZettaHash Inc. in the IEEE OUI registry. Any device whose MAC address begins with F0:0E:BF has a network interface built by ZettaHash Inc.. 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 F0:0E:BF:00:00:00 to F0:0E:BF:FF:FF:FF.

OUI prefix: F0:0E:BF
Hyphen form: F0-0E-BF
MAC range: F0:0E:BF:00:00:00 – F0:0E:BF:FF:FF:FF
Addresses in block: 16,777,216
Organization: ZettaHash Inc.
Address: 6F Chiyoda Ogawamachi Crosta, 1-11, Kanda Ogawamachi Chiyoda-ku Tokyo JP 101-0052
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 "ZettaHash Inc."
archived source →
2026-07-17Assigned to "ZettaHash Inc."

Nearby in the registry

The prefixes assigned immediately before and after F0:0E:BF:

FAQ

Which company owns MAC address prefix F0:0E:BF?: MAC address prefix F0:0E:BF is registered to ZettaHash Inc. in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with F0:0E:BF has a network interface built by ZettaHash Inc..
What is the OUI F0:0E:BF?: F0:0E:BF is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to ZettaHash Inc.. It covers every address from F0:0E:BF:00:00:00 to F0:0E:BF:FF:FF:FF, or 16,777,216 addresses in total. It is also written F0-0E-BF.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in F0:0E:BF:00:00:00 that is F0:0E:BF — 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 ZettaHash Inc. located?: ZettaHash Inc. is listed at 6F Chiyoda Ogawamachi Crosta, 1-11, Kanda Ogawamachi Chiyoda-ku Tokyo JP 101-0052 in the IEEE OUI registry entry for F0:0E:BF. This is the address the organization registered with the IEEE, which may differ from its current operating address.