Which company owns MAC address prefix 78:99:12?

MAC address prefix 78:99:12 is registered to Flyingvoice (HongKong) Technologies Limited in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 78:99:12 has a network interface built by Flyingvoice (HongKong) Technologies Limited.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in 78:99:12:00:00:00 that is 78:99:12 — 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 Flyingvoice (HongKong) Technologies Limited located?

Flyingvoice (HongKong) Technologies Limited is listed at FLAT/RM 19H MAXGRAND PLAZA NO.3 TAI YAU STREET SAN PO KONG KL Hong Kong Kowloon HK 999077 in the IEEE OUI registry entry for 78:99:12. This is the address the organization registered with the IEEE, which may differ from its current operating address.

Flyingvoice (HongKong) Technologies Limited

MAC address prefix 78:99:12 is registered to Flyingvoice (HongKong) Technologies Limited in the IEEE OUI registry. Any device whose MAC address begins with 78:99:12 has a network interface built by Flyingvoice (HongKong) Technologies 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 78:99:12:00:00:00 to 78:99:12:FF:FF:FF.

OUI prefix: 78:99:12
Hyphen form: 78-99-12
MAC range: 78:99:12:00:00:00 – 78:99:12:FF:FF:FF
Addresses in block: 16,777,216
Organization: Flyingvoice (HongKong) Technologies Limited
Address: FLAT/RM 19H MAXGRAND PLAZA NO.3 TAI YAU STREET SAN PO KONG KL Hong Kong Kowloon HK 999077
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.

2024-06-23Assigned to "Flyingvoice (HongKong) Technologies Limited"
archived source →
2026-07-17Assigned to "Flyingvoice (HongKong) Technologies Limited"

Nearby in the registry

The prefixes assigned immediately before and after 78:99:12:

FAQ

Which company owns MAC address prefix 78:99:12?: MAC address prefix 78:99:12 is registered to Flyingvoice (HongKong) Technologies Limited in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 78:99:12 has a network interface built by Flyingvoice (HongKong) Technologies Limited.
What is the OUI 78:99:12?: 78:99:12 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Flyingvoice (HongKong) Technologies Limited. It covers every address from 78:99:12:00:00:00 to 78:99:12:FF:FF:FF, or 16,777,216 addresses in total. It is also written 78-99-12.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in 78:99:12:00:00:00 that is 78:99:12 — 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 Flyingvoice (HongKong) Technologies Limited located?: Flyingvoice (HongKong) Technologies Limited is listed at FLAT/RM 19H MAXGRAND PLAZA NO.3 TAI YAU STREET SAN PO KONG KL Hong Kong Kowloon HK 999077 in the IEEE OUI registry entry for 78:99:12. This is the address the organization registered with the IEEE, which may differ from its current operating address.