Which company owns MAC address prefix 70:FF:5C?

MAC address prefix 70:FF:5C is registered to Cheerzing Communication(Xiamen)Technology Co.,Ltd in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 70:FF:5C has a network interface built by Cheerzing Communication(Xiamen)Technology Co.,Ltd.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in 70:FF:5C:00:00:00 that is 70:FF:5C — 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.

Cheerzing Communication(Xiamen)Technology Co.,Ltd

MAC address prefix 70:FF:5C is registered to Cheerzing Communication(Xiamen)Technology Co.,Ltd in the IEEE OUI registry. Any device whose MAC address begins with 70:FF:5C has a network interface built by Cheerzing Communication(Xiamen)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 70:FF:5C:00:00:00 to 70:FF:5C:FF:FF:FF.

OUI prefix: 70:FF:5C
Hyphen form: 70-FF-5C
MAC range: 70:FF:5C:00:00:00 – 70:FF:5C:FF:FF:FF
Addresses in block: 16,777,216
Organization: Cheerzing Communication(Xiamen)Technology Co.,Ltd
Address: Room N514,North Torch Building,5 Torch Road Xiamen Fujian CN 361005
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 "Cheerzing Communication(Xiamen)Technology Co.,Ltd"
archived source →
2026-07-17Assigned to "Cheerzing Communication(Xiamen)Technology Co.,Ltd"

Nearby in the registry

The prefixes assigned immediately before and after 70:FF:5C:

FAQ

Which company owns MAC address prefix 70:FF:5C?: MAC address prefix 70:FF:5C is registered to Cheerzing Communication(Xiamen)Technology Co.,Ltd in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 70:FF:5C has a network interface built by Cheerzing Communication(Xiamen)Technology Co.,Ltd.
What is the OUI 70:FF:5C?: 70:FF:5C is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Cheerzing Communication(Xiamen)Technology Co.,Ltd. It covers every address from 70:FF:5C:00:00:00 to 70:FF:5C:FF:FF:FF, or 16,777,216 addresses in total. It is also written 70-FF-5C.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in 70:FF:5C:00:00:00 that is 70:FF:5C — 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 Cheerzing Communication(Xiamen)Technology Co.,Ltd located?: Cheerzing Communication(Xiamen)Technology Co.,Ltd is listed at Room N514,North Torch Building,5 Torch Road Xiamen Fujian CN 361005 in the IEEE OUI registry entry for 70:FF:5C. This is the address the organization registered with the IEEE, which may differ from its current operating address.