Which company owns MAC address prefix A0:A1:30?

MAC address prefix A0:A1:30 is registered to DLI Taiwan Branch office in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with A0:A1:30 has a network interface built by DLI Taiwan Branch office.

What is the OUI A0:A1:30?

A0:A1:30 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to DLI Taiwan Branch office. It covers every address from A0:A1:30:00:00:00 to A0:A1:30:FF:FF:FF, or 16,777,216 addresses in total. It is also written A0-A1-30.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in A0:A1:30:00:00:00 that is A0:A1:30 — 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 DLI Taiwan Branch office located?

DLI Taiwan Branch office is listed at No.18-5, No.738. Zhong Zheng Rd Taipei New City TW 23511 in the IEEE OUI registry entry for A0:A1:30. This is the address the organization registered with the IEEE, which may differ from its current operating address.

DLI Taiwan Branch office

MAC address prefix A0:A1:30 is registered to DLI Taiwan Branch office in the IEEE OUI registry. Any device whose MAC address begins with A0:A1:30 has a network interface built by DLI Taiwan Branch office. 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 A0:A1:30:00:00:00 to A0:A1:30:FF:FF:FF.

OUI prefix: A0:A1:30
Hyphen form: A0-A1-30
MAC range: A0:A1:30:00:00:00 – A0:A1:30:FF:FF:FF
Addresses in block: 16,777,216
Organization: DLI Taiwan Branch office
Address: No.18-5, No.738. Zhong Zheng Rd Taipei New City TW 23511
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 "DLI Taiwan Branch office"
archived source →
2026-07-17Assigned to "DLI Taiwan Branch office"

Nearby in the registry

The prefixes assigned immediately before and after A0:A1:30:

FAQ

Which company owns MAC address prefix A0:A1:30?: MAC address prefix A0:A1:30 is registered to DLI Taiwan Branch office in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with A0:A1:30 has a network interface built by DLI Taiwan Branch office.
What is the OUI A0:A1:30?: A0:A1:30 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to DLI Taiwan Branch office. It covers every address from A0:A1:30:00:00:00 to A0:A1:30:FF:FF:FF, or 16,777,216 addresses in total. It is also written A0-A1-30.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in A0:A1:30:00:00:00 that is A0:A1:30 — 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 DLI Taiwan Branch office located?: DLI Taiwan Branch office is listed at No.18-5, No.738. Zhong Zheng Rd Taipei New City TW 23511 in the IEEE OUI registry entry for A0:A1:30. This is the address the organization registered with the IEEE, which may differ from its current operating address.