Which company owns MAC address prefix 9C:E9:51?

MAC address prefix 9C:E9:51 is registered to Shenzhen Sang Fei Consumer Communications Ltd., Co. in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 9C:E9:51 has a network interface built by Shenzhen Sang Fei Consumer Communications Ltd., Co..

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in 9C:E9:51:00:00:00 that is 9C:E9:51 — 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.

Shenzhen Sang Fei Consumer Communications Ltd., Co.

MAC address prefix 9C:E9:51 is registered to Shenzhen Sang Fei Consumer Communications Ltd., Co. in the IEEE OUI registry. Any device whose MAC address begins with 9C:E9:51 has a network interface built by Shenzhen Sang Fei Consumer Communications Ltd., Co.. 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 9C:E9:51:00:00:00 to 9C:E9:51:FF:FF:FF.

OUI prefix: 9C:E9:51
Hyphen form: 9C-E9-51
MAC range: 9C:E9:51:00:00:00 – 9C:E9:51:FF:FF:FF
Addresses in block: 16,777,216
Organization: Shenzhen Sang Fei Consumer Communications Ltd., Co.
Address: 11,Science And Technology Road, Shenzhen Hi-tech Industrial Park, Nanshan District Shenzhen City Guangdong CN 518057
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.

2017-09-08Assigned to "Shenzhen Sang Fei Consumer Communications Ltd., Co."
archived source →
2026-07-17Assigned to "Shenzhen Sang Fei Consumer Communications Ltd., Co."

Nearby in the registry

The prefixes assigned immediately before and after 9C:E9:51:

FAQ

Which company owns MAC address prefix 9C:E9:51?: MAC address prefix 9C:E9:51 is registered to Shenzhen Sang Fei Consumer Communications Ltd., Co. in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 9C:E9:51 has a network interface built by Shenzhen Sang Fei Consumer Communications Ltd., Co..
What is the OUI 9C:E9:51?: 9C:E9:51 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Shenzhen Sang Fei Consumer Communications Ltd., Co.. It covers every address from 9C:E9:51:00:00:00 to 9C:E9:51:FF:FF:FF, or 16,777,216 addresses in total. It is also written 9C-E9-51.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in 9C:E9:51:00:00:00 that is 9C:E9:51 — 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 Sang Fei Consumer Communications Ltd., Co. located?: Shenzhen Sang Fei Consumer Communications Ltd., Co. is listed at 11,Science And Technology Road, Shenzhen Hi-tech Industrial Park, Nanshan District Shenzhen City Guangdong CN 518057 in the IEEE OUI registry entry for 9C:E9:51. This is the address the organization registered with the IEEE, which may differ from its current operating address.