Which company owns MAC address prefix A4:F4:C2?

MAC address prefix A4:F4:C2 is registered to VNPT TECHNOLOGY in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with A4:F4:C2 has a network interface built by VNPT TECHNOLOGY.

What is the OUI A4:F4:C2?

A4:F4:C2 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to VNPT TECHNOLOGY. It covers every address from A4:F4:C2:00:00:00 to A4:F4:C2:FF:FF:FF, or 16,777,216 addresses in total. It is also written A4-F4-C2.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in A4:F4:C2:00:00:00 that is A4:F4:C2 — 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 VNPT TECHNOLOGY located?

VNPT TECHNOLOGY is listed at HoaLac Hi-Tech Park HANOI HANOI VN 10000 in the IEEE OUI registry entry for A4:F4:C2. This is the address the organization registered with the IEEE, which may differ from its current operating address.

How many MAC prefixes does VNPT TECHNOLOGY own?

VNPT TECHNOLOGY holds 3 OUI prefixes in the IEEE registry, of which A4:F4:C2 is one. A device made by VNPT TECHNOLOGY could carry a MAC address from any of them.

VNPT TECHNOLOGY

MAC address prefix A4:F4:C2 is registered to VNPT TECHNOLOGY in the IEEE OUI registry. Any device whose MAC address begins with A4:F4:C2 has a network interface built by VNPT TECHNOLOGY. 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 A4:F4:C2:00:00:00 to A4:F4:C2:FF:FF:FF.

OUI prefix: A4:F4:C2
Hyphen form: A4-F4-C2
MAC range: A4:F4:C2:00:00:00 – A4:F4:C2:FF:FF:FF
Addresses in block: 16,777,216
Organization: VNPT TECHNOLOGY
Address: HoaLac Hi-Tech Park HANOI HANOI VN 10000
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.

Other prefixes from VNPT TECHNOLOGY

VNPT TECHNOLOGY holds 3 OUI prefixes in total. A device with this exact prefix could just as well carry any of these:

Assignment history (2)

The IEEE registry publishes current state only — this is the change record we've kept since we started tracking it daily.

2017-09-08Assigned to "VNPT TECHNOLOGY"
archived source →
2026-07-17Assigned to "VNPT TECHNOLOGY"

Nearby in the registry

The prefixes assigned immediately before and after A4:F4:C2:

FAQ

Which company owns MAC address prefix A4:F4:C2?: MAC address prefix A4:F4:C2 is registered to VNPT TECHNOLOGY in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with A4:F4:C2 has a network interface built by VNPT TECHNOLOGY.
What is the OUI A4:F4:C2?: A4:F4:C2 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to VNPT TECHNOLOGY. It covers every address from A4:F4:C2:00:00:00 to A4:F4:C2:FF:FF:FF, or 16,777,216 addresses in total. It is also written A4-F4-C2.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in A4:F4:C2:00:00:00 that is A4:F4:C2 — 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 VNPT TECHNOLOGY located?: VNPT TECHNOLOGY is listed at HoaLac Hi-Tech Park HANOI HANOI VN 10000 in the IEEE OUI registry entry for A4:F4:C2. This is the address the organization registered with the IEEE, which may differ from its current operating address.
How many MAC prefixes does VNPT TECHNOLOGY own?: VNPT TECHNOLOGY holds 3 OUI prefixes in the IEEE registry, of which A4:F4:C2 is one. A device made by VNPT TECHNOLOGY could carry a MAC address from any of them.