Which company owns MAC address prefix D0:6F:4A?

MAC address prefix D0:6F:4A is registered to TOPWELL INTERNATIONAL HOLDINGS LIMITED in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with D0:6F:4A has a network interface built by TOPWELL INTERNATIONAL HOLDINGS LIMITED.

What is the OUI D0:6F:4A?

D0:6F:4A is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to TOPWELL INTERNATIONAL HOLDINGS LIMITED. It covers every address from D0:6F:4A:00:00:00 to D0:6F:4A:FF:FF:FF, or 16,777,216 addresses in total. It is also written D0-6F-4A.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in D0:6F:4A:00:00:00 that is D0:6F:4A — 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 TOPWELL INTERNATIONAL HOLDINGS LIMITED located?

TOPWELL INTERNATIONAL HOLDINGS LIMITED is listed at Unit 2506, 25/F, Prosperity Place, Hong Kong N/A CN N/A in the IEEE OUI registry entry for D0:6F:4A. This is the address the organization registered with the IEEE, which may differ from its current operating address.

TOPWELL INTERNATIONAL HOLDINGS LIMITED

MAC address prefix D0:6F:4A is registered to TOPWELL INTERNATIONAL HOLDINGS LIMITED in the IEEE OUI registry. Any device whose MAC address begins with D0:6F:4A has a network interface built by TOPWELL INTERNATIONAL HOLDINGS 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 D0:6F:4A:00:00:00 to D0:6F:4A:FF:FF:FF.

OUI prefix: D0:6F:4A
Hyphen form: D0-6F-4A
MAC range: D0:6F:4A:00:00:00 – D0:6F:4A:FF:FF:FF
Addresses in block: 16,777,216
Organization: TOPWELL INTERNATIONAL HOLDINGS LIMITED
Address: Unit 2506, 25/F, Prosperity Place, Hong Kong N/A CN N/A
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 "TOPWELL INTERNATIONAL HOLDINGS LIMITED"
archived source →
2026-07-17Assigned to "TOPWELL INTERNATIONAL HOLDINGS LIMITED"

Nearby in the registry

The prefixes assigned immediately before and after D0:6F:4A:

FAQ

Which company owns MAC address prefix D0:6F:4A?: MAC address prefix D0:6F:4A is registered to TOPWELL INTERNATIONAL HOLDINGS LIMITED in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with D0:6F:4A has a network interface built by TOPWELL INTERNATIONAL HOLDINGS LIMITED.
What is the OUI D0:6F:4A?: D0:6F:4A is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to TOPWELL INTERNATIONAL HOLDINGS LIMITED. It covers every address from D0:6F:4A:00:00:00 to D0:6F:4A:FF:FF:FF, or 16,777,216 addresses in total. It is also written D0-6F-4A.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in D0:6F:4A:00:00:00 that is D0:6F:4A — 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 TOPWELL INTERNATIONAL HOLDINGS LIMITED located?: TOPWELL INTERNATIONAL HOLDINGS LIMITED is listed at Unit 2506, 25/F, Prosperity Place, Hong Kong N/A CN N/A in the IEEE OUI registry entry for D0:6F:4A. This is the address the organization registered with the IEEE, which may differ from its current operating address.