Which company owns MAC address prefix B0:BF:99?

MAC address prefix B0:BF:99 is registered to WIZITDONGDO in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with B0:BF:99 has a network interface built by WIZITDONGDO.

What is the OUI B0:BF:99?

B0:BF:99 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to WIZITDONGDO. It covers every address from B0:BF:99:00:00:00 to B0:BF:99:FF:FF:FF, or 16,777,216 addresses in total. It is also written B0-BF-99.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in B0:BF:99:00:00:00 that is B0:BF:99 — 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 WIZITDONGDO located?

WIZITDONGDO is listed at 2F, 299-1, 3-DONG, SUNGSU 2-GA SEOUL KR 133-833 in the IEEE OUI registry entry for B0:BF:99. This is the address the organization registered with the IEEE, which may differ from its current operating address.

WIZITDONGDO

MAC address prefix B0:BF:99 is registered to WIZITDONGDO in the IEEE OUI registry. Any device whose MAC address begins with B0:BF:99 has a network interface built by WIZITDONGDO. 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:BF:99:00:00:00 to B0:BF:99:FF:FF:FF.

OUI prefix: B0:BF:99
Hyphen form: B0-BF-99
MAC range: B0:BF:99:00:00:00 – B0:BF:99:FF:FF:FF
Addresses in block: 16,777,216
Organization: WIZITDONGDO
Address: 2F, 299-1, 3-DONG, SUNGSU 2-GA SEOUL KR 133-833
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 "WIZITDONGDO"
archived source →
2026-07-17Assigned to "WIZITDONGDO"

Nearby in the registry

The prefixes assigned immediately before and after B0:BF:99:

FAQ

Which company owns MAC address prefix B0:BF:99?: MAC address prefix B0:BF:99 is registered to WIZITDONGDO in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with B0:BF:99 has a network interface built by WIZITDONGDO.
What is the OUI B0:BF:99?: B0:BF:99 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to WIZITDONGDO. It covers every address from B0:BF:99:00:00:00 to B0:BF:99:FF:FF:FF, or 16,777,216 addresses in total. It is also written B0-BF-99.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in B0:BF:99:00:00:00 that is B0:BF:99 — 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 WIZITDONGDO located?: WIZITDONGDO is listed at 2F, 299-1, 3-DONG, SUNGSU 2-GA SEOUL KR 133-833 in the IEEE OUI registry entry for B0:BF:99. This is the address the organization registered with the IEEE, which may differ from its current operating address.