Which company owns MAC address prefix B0:65:F1?

MAC address prefix B0:65:F1 is registered to WIO Manufacturing HK Limited in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with B0:65:F1 has a network interface built by WIO Manufacturing HK Limited.

What is the OUI B0:65:F1?

B0:65:F1 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to WIO Manufacturing HK Limited. It covers every address from B0:65:F1:00:00:00 to B0:65:F1:FF:FF:FF, or 16,777,216 addresses in total. It is also written B0-65-F1.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in B0:65:F1:00:00:00 that is B0:65:F1 — 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 WIO Manufacturing HK Limited located?

WIO Manufacturing HK Limited is listed at 15/F OTB Building, 160 Glocester Road Hong Kong HK 00000 in the IEEE OUI registry entry for B0:65:F1. This is the address the organization registered with the IEEE, which may differ from its current operating address.

WIO Manufacturing HK Limited

MAC address prefix B0:65:F1 is registered to WIO Manufacturing HK Limited in the IEEE OUI registry. Any device whose MAC address begins with B0:65:F1 has a network interface built by WIO Manufacturing HK Limited. 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 B0:65:F1:00:00:00 to B0:65:F1:FF:FF:FF.

OUI prefix: B0:65:F1
Hyphen form: B0-65-F1
MAC range: B0:65:F1:00:00:00 – B0:65:F1:FF:FF:FF
Addresses in block: 16,777,216
Organization: WIO Manufacturing HK Limited
Address: 15/F OTB Building, 160 Glocester Road Hong Kong HK 00000
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.

2019-07-04Assigned to "WIO Manufacturing HK Limited"
archived source →
2026-07-17Assigned to "WIO Manufacturing HK Limited"

Nearby in the registry

The prefixes assigned immediately before and after B0:65:F1:

FAQ

Which company owns MAC address prefix B0:65:F1?: MAC address prefix B0:65:F1 is registered to WIO Manufacturing HK Limited in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with B0:65:F1 has a network interface built by WIO Manufacturing HK Limited.
What is the OUI B0:65:F1?: B0:65:F1 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to WIO Manufacturing HK Limited. It covers every address from B0:65:F1:00:00:00 to B0:65:F1:FF:FF:FF, or 16,777,216 addresses in total. It is also written B0-65-F1.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in B0:65:F1:00:00:00 that is B0:65:F1 — 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 WIO Manufacturing HK Limited located?: WIO Manufacturing HK Limited is listed at 15/F OTB Building, 160 Glocester Road Hong Kong HK 00000 in the IEEE OUI registry entry for B0:65:F1. This is the address the organization registered with the IEEE, which may differ from its current operating address.