Which company owns MAC address prefix 30:BB:43?

MAC address prefix 30:BB:43 is registered to Sixi Networks Co., Ltd in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 30:BB:43 has a network interface built by Sixi Networks Co., Ltd.

What is the OUI 30:BB:43?

30:BB:43 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Sixi Networks Co., Ltd. It covers every address from 30:BB:43:00:00:00 to 30:BB:43:FF:FF:FF, or 16,777,216 addresses in total. It is also written 30-BB-43.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in 30:BB:43:00:00:00 that is 30:BB:43 — 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 Sixi Networks Co., Ltd located?

Sixi Networks Co., Ltd is listed at Room 1111, Guigu Building, No. 9 Wangjiang West Road Hefei Anhui CN 230022 in the IEEE OUI registry entry for 30:BB:43. This is the address the organization registered with the IEEE, which may differ from its current operating address.

Sixi Networks Co., Ltd

MAC address prefix 30:BB:43 is registered to Sixi Networks Co., Ltd in the IEEE OUI registry. Any device whose MAC address begins with 30:BB:43 has a network interface built by Sixi Networks 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 30:BB:43:00:00:00 to 30:BB:43:FF:FF:FF.

OUI prefix: 30:BB:43
Hyphen form: 30-BB-43
MAC range: 30:BB:43:00:00:00 – 30:BB:43:FF:FF:FF
Addresses in block: 16,777,216
Organization: Sixi Networks Co., Ltd
Address: Room 1111, Guigu Building, No. 9 Wangjiang West Road Hefei Anhui CN 230022
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.

2025-02-27Assigned to "Sixi Networks Co., Ltd"
archived source →
2026-07-17Assigned to "Sixi Networks Co., Ltd"

Nearby in the registry

The prefixes assigned immediately before and after 30:BB:43:

FAQ

Which company owns MAC address prefix 30:BB:43?: MAC address prefix 30:BB:43 is registered to Sixi Networks Co., Ltd in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 30:BB:43 has a network interface built by Sixi Networks Co., Ltd.
What is the OUI 30:BB:43?: 30:BB:43 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Sixi Networks Co., Ltd. It covers every address from 30:BB:43:00:00:00 to 30:BB:43:FF:FF:FF, or 16,777,216 addresses in total. It is also written 30-BB-43.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in 30:BB:43:00:00:00 that is 30:BB:43 — 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 Sixi Networks Co., Ltd located?: Sixi Networks Co., Ltd is listed at Room 1111, Guigu Building, No. 9 Wangjiang West Road Hefei Anhui CN 230022 in the IEEE OUI registry entry for 30:BB:43. This is the address the organization registered with the IEEE, which may differ from its current operating address.