Which company owns MAC address prefix D4:3D:7E?

MAC address prefix D4:3D:7E is registered to Micro-Star Int'l Co, Ltd in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with D4:3D:7E has a network interface built by Micro-Star Int'l Co, Ltd.

What is the OUI D4:3D:7E?

D4:3D:7E is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Micro-Star Int'l Co, Ltd. It covers every address from D4:3D:7E:00:00:00 to D4:3D:7E:FF:FF:FF, or 16,777,216 addresses in total. It is also written D4-3D-7E.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in D4:3D:7E:00:00:00 that is D4:3D:7E — 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 Micro-Star Int'l Co, Ltd located?

Micro-Star Int'l Co, Ltd is listed at No.69, Lide St., Jhonghe City Taipei County US 235 in the IEEE OUI registry entry for D4:3D:7E. This is the address the organization registered with the IEEE, which may differ from its current operating address.

Micro-Star Int'l Co, Ltd

MAC address prefix D4:3D:7E is registered to Micro-Star Int'l Co, Ltd in the IEEE OUI registry. Any device whose MAC address begins with D4:3D:7E has a network interface built by Micro-Star Int'l Co, Ltd. 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 D4:3D:7E:00:00:00 to D4:3D:7E:FF:FF:FF.

OUI prefix: D4:3D:7E
Hyphen form: D4-3D-7E
MAC range: D4:3D:7E:00:00:00 – D4:3D:7E:FF:FF:FF
Addresses in block: 16,777,216
Organization: Micro-Star Int'l Co, Ltd
Address: No.69, Lide St., Jhonghe City Taipei County US 235
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 "Micro-Star Int'l Co, Ltd"
archived source →
2026-07-17Assigned to "Micro-Star Int'l Co, Ltd"

Nearby in the registry

The prefixes assigned immediately before and after D4:3D:7E:

FAQ

Which company owns MAC address prefix D4:3D:7E?: MAC address prefix D4:3D:7E is registered to Micro-Star Int'l Co, Ltd in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with D4:3D:7E has a network interface built by Micro-Star Int'l Co, Ltd.
What is the OUI D4:3D:7E?: D4:3D:7E is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Micro-Star Int'l Co, Ltd. It covers every address from D4:3D:7E:00:00:00 to D4:3D:7E:FF:FF:FF, or 16,777,216 addresses in total. It is also written D4-3D-7E.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in D4:3D:7E:00:00:00 that is D4:3D:7E — 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 Micro-Star Int'l Co, Ltd located?: Micro-Star Int'l Co, Ltd is listed at No.69, Lide St., Jhonghe City Taipei County US 235 in the IEEE OUI registry entry for D4:3D:7E. This is the address the organization registered with the IEEE, which may differ from its current operating address.