Which company owns MAC address prefix D4:9A:A0?

MAC address prefix D4:9A:A0 is registered to VNPT TECHNOLOGY in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with D4:9A:A0 has a network interface built by VNPT TECHNOLOGY.

What is the OUI D4:9A:A0?

D4:9A:A0 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 D4:9A:A0:00:00:00 to D4:9A:A0:FF:FF:FF, or 16,777,216 addresses in total. It is also written D4-9A-A0.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in D4:9A:A0:00:00:00 that is D4:9A:A0 — 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 D4:9A:A0. 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 D4:9A:A0 is one. A device made by VNPT TECHNOLOGY could carry a MAC address from any of them.

VNPT TECHNOLOGY

MAC address prefix D4:9A:A0 is registered to VNPT TECHNOLOGY in the IEEE OUI registry. Any device whose MAC address begins with D4:9A:A0 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 D4:9A:A0:00:00:00 to D4:9A:A0:FF:FF:FF.

OUI prefix: D4:9A:A0
Hyphen form: D4-9A-A0
MAC range: D4:9A:A0:00:00:00 – D4:9A:A0: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.

2020-03-21Assigned to "VNPT TECHNOLOGY"
archived source →
2026-07-17Assigned to "VNPT TECHNOLOGY"

Nearby in the registry

The prefixes assigned immediately before and after D4:9A:A0:

FAQ

Which company owns MAC address prefix D4:9A:A0?: MAC address prefix D4:9A:A0 is registered to VNPT TECHNOLOGY in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with D4:9A:A0 has a network interface built by VNPT TECHNOLOGY.
What is the OUI D4:9A:A0?: D4:9A:A0 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 D4:9A:A0:00:00:00 to D4:9A:A0:FF:FF:FF, or 16,777,216 addresses in total. It is also written D4-9A-A0.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in D4:9A:A0:00:00:00 that is D4:9A:A0 — 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 D4:9A:A0. 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 D4:9A:A0 is one. A device made by VNPT TECHNOLOGY could carry a MAC address from any of them.