Which company owns MAC address prefix 50:D3:3B?

MAC address prefix 50:D3:3B is registered to cloudnineinfo in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 50:D3:3B has a network interface built by cloudnineinfo.

What is the OUI 50:D3:3B?

50:D3:3B is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to cloudnineinfo. It covers every address from 50:D3:3B:00:00:00 to 50:D3:3B:FF:FF:FF, or 16,777,216 addresses in total. It is also written 50-D3-3B.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in 50:D3:3B:00:00:00 that is 50:D3:3B — 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 cloudnineinfo located?

cloudnineinfo is listed at xiaoshan Wujin load #19 hangzhou zhejiang CN 311258 in the IEEE OUI registry entry for 50:D3:3B. This is the address the organization registered with the IEEE, which may differ from its current operating address.

cloudnineinfo

MAC address prefix 50:D3:3B is registered to cloudnineinfo in the IEEE OUI registry. Any device whose MAC address begins with 50:D3:3B has a network interface built by cloudnineinfo. 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 50:D3:3B:00:00:00 to 50:D3:3B:FF:FF:FF.

OUI prefix: 50:D3:3B
Hyphen form: 50-D3-3B
MAC range: 50:D3:3B:00:00:00 – 50:D3:3B:FF:FF:FF
Addresses in block: 16,777,216
Organization: cloudnineinfo
Address: xiaoshan Wujin load #19 hangzhou zhejiang CN 311258
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 (1)

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

2026-07-17Assigned to "cloudnineinfo"

Nearby in the registry

The prefixes assigned immediately before and after 50:D3:3B:

FAQ

Which company owns MAC address prefix 50:D3:3B?: MAC address prefix 50:D3:3B is registered to cloudnineinfo in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 50:D3:3B has a network interface built by cloudnineinfo.
What is the OUI 50:D3:3B?: 50:D3:3B is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to cloudnineinfo. It covers every address from 50:D3:3B:00:00:00 to 50:D3:3B:FF:FF:FF, or 16,777,216 addresses in total. It is also written 50-D3-3B.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in 50:D3:3B:00:00:00 that is 50:D3:3B — 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 cloudnineinfo located?: cloudnineinfo is listed at xiaoshan Wujin load #19 hangzhou zhejiang CN 311258 in the IEEE OUI registry entry for 50:D3:3B. This is the address the organization registered with the IEEE, which may differ from its current operating address.