Which company owns MAC address prefix 00:1A:71?

MAC address prefix 00:1A:71 is registered to Diostech Co., Ltd. in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 00:1A:71 has a network interface built by Diostech Co., Ltd..

What is the OUI 00:1A:71?

00:1A:71 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Diostech Co., Ltd.. It covers every address from 00:1A:71:00:00:00 to 00:1A:71:FF:FF:FF, or 16,777,216 addresses in total. It is also written 00-1A-71.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in 00:1A:71:00:00:00 that is 00:1A:71 — 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 Diostech Co., Ltd. located?

Diostech Co., Ltd. is listed at 151-21, Buk-ri, Namsa-myeon, Yongin-city Gyeonggi-do KR 449 884 in the IEEE OUI registry entry for 00:1A:71. This is the address the organization registered with the IEEE, which may differ from its current operating address.

Diostech Co., Ltd.

MAC address prefix 00:1A:71 is registered to Diostech Co., Ltd. in the IEEE OUI registry. Any device whose MAC address begins with 00:1A:71 has a network interface built by Diostech 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 00:1A:71:00:00:00 to 00:1A:71:FF:FF:FF.

OUI prefix: 00:1A:71
Hyphen form: 00-1A-71
MAC range: 00:1A:71:00:00:00 – 00:1A:71:FF:FF:FF
Addresses in block: 16,777,216
Organization: Diostech Co., Ltd.
Address: 151-21, Buk-ri, Namsa-myeon, Yongin-city Gyeonggi-do KR 449 884
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 "Diostech Co., Ltd."
archived source →
2026-07-17Assigned to "Diostech Co., Ltd."

Nearby in the registry

The prefixes assigned immediately before and after 00:1A:71:

FAQ

Which company owns MAC address prefix 00:1A:71?: MAC address prefix 00:1A:71 is registered to Diostech Co., Ltd. in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 00:1A:71 has a network interface built by Diostech Co., Ltd..
What is the OUI 00:1A:71?: 00:1A:71 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Diostech Co., Ltd.. It covers every address from 00:1A:71:00:00:00 to 00:1A:71:FF:FF:FF, or 16,777,216 addresses in total. It is also written 00-1A-71.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in 00:1A:71:00:00:00 that is 00:1A:71 — 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 Diostech Co., Ltd. located?: Diostech Co., Ltd. is listed at 151-21, Buk-ri, Namsa-myeon, Yongin-city Gyeonggi-do KR 449 884 in the IEEE OUI registry entry for 00:1A:71. This is the address the organization registered with the IEEE, which may differ from its current operating address.