Which company owns MAC address prefix A0:3B:1B?

MAC address prefix A0:3B:1B is registered to Inspire Tech in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with A0:3B:1B has a network interface built by Inspire Tech.

What is the OUI A0:3B:1B?

A0:3B:1B is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Inspire Tech. It covers every address from A0:3B:1B:00:00:00 to A0:3B:1B:FF:FF:FF, or 16,777,216 addresses in total. It is also written A0-3B-1B.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in A0:3B:1B:00:00:00 that is A0:3B:1B — 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 Inspire Tech located?

Inspire Tech is listed at No.588-10,Zhongzheng Rd.,Xinzhuang Dist New Taipei Taiwan TW 24255 in the IEEE OUI registry entry for A0:3B:1B. This is the address the organization registered with the IEEE, which may differ from its current operating address.

Inspire Tech

MAC address prefix A0:3B:1B is registered to Inspire Tech in the IEEE OUI registry. Any device whose MAC address begins with A0:3B:1B has a network interface built by Inspire Tech. 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 A0:3B:1B:00:00:00 to A0:3B:1B:FF:FF:FF.

OUI prefix: A0:3B:1B
Hyphen form: A0-3B-1B
MAC range: A0:3B:1B:00:00:00 – A0:3B:1B:FF:FF:FF
Addresses in block: 16,777,216
Organization: Inspire Tech
Address: No.588-10,Zhongzheng Rd.,Xinzhuang Dist New Taipei Taiwan TW 24255
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 "Inspire Tech"
archived source →
2026-07-17Assigned to "Inspire Tech"

Nearby in the registry

The prefixes assigned immediately before and after A0:3B:1B:

FAQ

Which company owns MAC address prefix A0:3B:1B?: MAC address prefix A0:3B:1B is registered to Inspire Tech in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with A0:3B:1B has a network interface built by Inspire Tech.
What is the OUI A0:3B:1B?: A0:3B:1B is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Inspire Tech. It covers every address from A0:3B:1B:00:00:00 to A0:3B:1B:FF:FF:FF, or 16,777,216 addresses in total. It is also written A0-3B-1B.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in A0:3B:1B:00:00:00 that is A0:3B:1B — 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 Inspire Tech located?: Inspire Tech is listed at No.588-10,Zhongzheng Rd.,Xinzhuang Dist New Taipei Taiwan TW 24255 in the IEEE OUI registry entry for A0:3B:1B. This is the address the organization registered with the IEEE, which may differ from its current operating address.