Which company owns MAC address prefix 90:20:3A?

MAC address prefix 90:20:3A is registered to BYD Precision Manufacture Co.,Ltd in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 90:20:3A has a network interface built by BYD Precision Manufacture Co.,Ltd.

What is the OUI 90:20:3A?

90:20:3A is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to BYD Precision Manufacture Co.,Ltd. It covers every address from 90:20:3A:00:00:00 to 90:20:3A:FF:FF:FF, or 16,777,216 addresses in total. It is also written 90-20-3A.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in 90:20:3A:00:00:00 that is 90:20:3A — 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 BYD Precision Manufacture Co.,Ltd located?

BYD Precision Manufacture Co.,Ltd is listed at Building 23#，NO.3009 BYD Road，Pingshan Shenzhen Guangdong CN 518118 in the IEEE OUI registry entry for 90:20:3A. This is the address the organization registered with the IEEE, which may differ from its current operating address.

BYD Precision Manufacture Co.,Ltd

MAC address prefix 90:20:3A is registered to BYD Precision Manufacture Co.,Ltd in the IEEE OUI registry. Any device whose MAC address begins with 90:20:3A has a network interface built by BYD Precision Manufacture 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 90:20:3A:00:00:00 to 90:20:3A:FF:FF:FF.

OUI prefix: 90:20:3A
Hyphen form: 90-20-3A
MAC range: 90:20:3A:00:00:00 – 90:20:3A:FF:FF:FF
Addresses in block: 16,777,216
Organization: BYD Precision Manufacture Co.,Ltd
Address: Building 23#，NO.3009 BYD Road，Pingshan Shenzhen Guangdong CN 518118
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 "BYD Precision Manufacture Co.,Ltd"
archived source →
2026-07-17Assigned to "BYD Precision Manufacture Co.,Ltd"

Nearby in the registry

The prefixes assigned immediately before and after 90:20:3A:

FAQ

Which company owns MAC address prefix 90:20:3A?: MAC address prefix 90:20:3A is registered to BYD Precision Manufacture Co.,Ltd in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 90:20:3A has a network interface built by BYD Precision Manufacture Co.,Ltd.
What is the OUI 90:20:3A?: 90:20:3A is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to BYD Precision Manufacture Co.,Ltd. It covers every address from 90:20:3A:00:00:00 to 90:20:3A:FF:FF:FF, or 16,777,216 addresses in total. It is also written 90-20-3A.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in 90:20:3A:00:00:00 that is 90:20:3A — 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 BYD Precision Manufacture Co.,Ltd located?: BYD Precision Manufacture Co.,Ltd is listed at Building 23#，NO.3009 BYD Road，Pingshan Shenzhen Guangdong CN 518118 in the IEEE OUI registry entry for 90:20:3A. This is the address the organization registered with the IEEE, which may differ from its current operating address.