Which company owns MAC address prefix D8:03:1A?

MAC address prefix D8:03:1A is registered to Ezurio, LLC in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with D8:03:1A has a network interface built by Ezurio, LLC.

What is the OUI D8:03:1A?

D8:03:1A is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Ezurio, LLC. It covers every address from D8:03:1A:00:00:00 to D8:03:1A:FF:FF:FF, or 16,777,216 addresses in total. It is also written D8-03-1A.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in D8:03:1A:00:00:00 that is D8:03:1A — 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 Ezurio, LLC located?

Ezurio, LLC is listed at 3F.-1, No.145, Xianzheng 9th Rd., Zhubei TW 30251 in the IEEE OUI registry entry for D8:03:1A. This is the address the organization registered with the IEEE, which may differ from its current operating address.

How many MAC prefixes does Ezurio, LLC own?

Ezurio, LLC holds 7 OUI prefixes in the IEEE registry, of which D8:03:1A is one. A device made by Ezurio, LLC could carry a MAC address from any of them.

Ezurio, LLC

MAC address prefix D8:03:1A is registered to Ezurio, LLC in the IEEE OUI registry. Any device whose MAC address begins with D8:03:1A has a network interface built by Ezurio, LLC. 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 D8:03:1A:00:00:00 to D8:03:1A:FF:FF:FF.

OUI prefix: D8:03:1A
Hyphen form: D8-03-1A
MAC range: D8:03:1A:00:00:00 – D8:03:1A:FF:FF:FF
Addresses in block: 16,777,216
Organization: Ezurio, LLC
Address: 3F.-1, No.145, Xianzheng 9th Rd., Zhubei TW 30251
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.

Other prefixes from Ezurio, LLC

Ezurio, LLC holds 7 OUI prefixes in total. A device with this exact prefix could just as well carry any of these:

Assignment history (3)

The IEEE registry publishes current state only — this is the change record we've kept since we started tracking it daily.

2023-07-11Assigned to "Laird Connectivity"
archived source →
2026-01-08Renamed from "Laird Connectivity" to "Ezurio, LLC"
archived source →
2026-07-17Assigned to "Ezurio, LLC"

Nearby in the registry

The prefixes assigned immediately before and after D8:03:1A:

FAQ

Which company owns MAC address prefix D8:03:1A?: MAC address prefix D8:03:1A is registered to Ezurio, LLC in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with D8:03:1A has a network interface built by Ezurio, LLC.
What is the OUI D8:03:1A?: D8:03:1A is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Ezurio, LLC. It covers every address from D8:03:1A:00:00:00 to D8:03:1A:FF:FF:FF, or 16,777,216 addresses in total. It is also written D8-03-1A.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in D8:03:1A:00:00:00 that is D8:03:1A — 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 Ezurio, LLC located?: Ezurio, LLC is listed at 3F.-1, No.145, Xianzheng 9th Rd., Zhubei TW 30251 in the IEEE OUI registry entry for D8:03:1A. This is the address the organization registered with the IEEE, which may differ from its current operating address.
How many MAC prefixes does Ezurio, LLC own?: Ezurio, LLC holds 7 OUI prefixes in the IEEE registry, of which D8:03:1A is one. A device made by Ezurio, LLC could carry a MAC address from any of them.