Which company owns MAC address prefix 00:A1:DE?

MAC address prefix 00:A1:DE is registered to ShenZhen ShiHua Technology CO.,LTD in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 00:A1:DE has a network interface built by ShenZhen ShiHua Technology CO.,LTD.

What is the OUI 00:A1:DE?

00:A1:DE is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to ShenZhen ShiHua Technology CO.,LTD. It covers every address from 00:A1:DE:00:00:00 to 00:A1:DE:FF:FF:FF, or 16,777,216 addresses in total. It is also written 00-A1-DE.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in 00:A1:DE:00:00:00 that is 00:A1:DE — 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 ShenZhen ShiHua Technology CO.,LTD located?

ShenZhen ShiHua Technology CO.,LTD is listed at Room505,5/F TsingYi Building,LangShan 2ed Road,High-Tech Industrial Park, ShenZhen GuangDong CN 518052 in the IEEE OUI registry entry for 00:A1:DE. This is the address the organization registered with the IEEE, which may differ from its current operating address.

ShenZhen ShiHua Technology CO.,LTD

MAC address prefix 00:A1:DE is registered to ShenZhen ShiHua Technology CO.,LTD in the IEEE OUI registry. Any device whose MAC address begins with 00:A1:DE has a network interface built by ShenZhen ShiHua Technology 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:A1:DE:00:00:00 to 00:A1:DE:FF:FF:FF.

OUI prefix: 00:A1:DE
Hyphen form: 00-A1-DE
MAC range: 00:A1:DE:00:00:00 – 00:A1:DE:FF:FF:FF
Addresses in block: 16,777,216
Organization: ShenZhen ShiHua Technology CO.,LTD
Address: Room505,5/F TsingYi Building,LangShan 2ed Road,High-Tech Industrial Park, ShenZhen GuangDong CN 518052
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 "ShenZhen ShiHua Technology CO.,LTD"
archived source →
2026-07-17Assigned to "ShenZhen ShiHua Technology CO.,LTD"

Nearby in the registry

The prefixes assigned immediately before and after 00:A1:DE:

FAQ

Which company owns MAC address prefix 00:A1:DE?: MAC address prefix 00:A1:DE is registered to ShenZhen ShiHua Technology CO.,LTD in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 00:A1:DE has a network interface built by ShenZhen ShiHua Technology CO.,LTD.
What is the OUI 00:A1:DE?: 00:A1:DE is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to ShenZhen ShiHua Technology CO.,LTD. It covers every address from 00:A1:DE:00:00:00 to 00:A1:DE:FF:FF:FF, or 16,777,216 addresses in total. It is also written 00-A1-DE.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in 00:A1:DE:00:00:00 that is 00:A1:DE — 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 ShenZhen ShiHua Technology CO.,LTD located?: ShenZhen ShiHua Technology CO.,LTD is listed at Room505,5/F TsingYi Building,LangShan 2ed Road,High-Tech Industrial Park, ShenZhen GuangDong CN 518052 in the IEEE OUI registry entry for 00:A1:DE. This is the address the organization registered with the IEEE, which may differ from its current operating address.