Which company owns MAC address prefix 5C:D5:B5?

MAC address prefix 5C:D5:B5 is registered to Shenzhen WiSiYiLink Technology Co.,Ltd in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 5C:D5:B5 has a network interface built by Shenzhen WiSiYiLink Technology Co.,Ltd.

What is the OUI 5C:D5:B5?

5C:D5:B5 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Shenzhen WiSiYiLink Technology Co.,Ltd. It covers every address from 5C:D5:B5:00:00:00 to 5C:D5:B5:FF:FF:FF, or 16,777,216 addresses in total. It is also written 5C-D5-B5.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in 5C:D5:B5:00:00:00 that is 5C:D5:B5 — 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 WiSiYiLink Technology Co.,Ltd located?

Shenzhen WiSiYiLink Technology Co.,Ltd is listed at Building a 3, huafengzhigu Yuanshan hi tech Industrial Park, No.62, Yinhe Road, he'ao community, Yuanshan street, Longgang District Shenzhen CN 518100 in the IEEE OUI registry entry for 5C:D5:B5. This is the address the organization registered with the IEEE, which may differ from its current operating address.

Shenzhen WiSiYiLink Technology Co.,Ltd

MAC address prefix 5C:D5:B5 is registered to Shenzhen WiSiYiLink Technology Co.,Ltd in the IEEE OUI registry. Any device whose MAC address begins with 5C:D5:B5 has a network interface built by Shenzhen WiSiYiLink 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 5C:D5:B5:00:00:00 to 5C:D5:B5:FF:FF:FF.

OUI prefix: 5C:D5:B5
Hyphen form: 5C-D5-B5
MAC range: 5C:D5:B5:00:00:00 – 5C:D5:B5:FF:FF:FF
Addresses in block: 16,777,216
Organization: Shenzhen WiSiYiLink Technology Co.,Ltd
Address: Building a 3, huafengzhigu Yuanshan hi tech Industrial Park, No.62, Yinhe Road, he'ao community, Yuanshan street, Longgang District Shenzhen CN 518100
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.

2020-04-23Assigned to "Shenzhen WiSiYiLink Technology Co.,Ltd"
archived source →
2026-07-17Assigned to "Shenzhen WiSiYiLink Technology Co.,Ltd"

Nearby in the registry

The prefixes assigned immediately before and after 5C:D5:B5:

FAQ

Which company owns MAC address prefix 5C:D5:B5?: MAC address prefix 5C:D5:B5 is registered to Shenzhen WiSiYiLink Technology Co.,Ltd in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 5C:D5:B5 has a network interface built by Shenzhen WiSiYiLink Technology Co.,Ltd.
What is the OUI 5C:D5:B5?: 5C:D5:B5 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Shenzhen WiSiYiLink Technology Co.,Ltd. It covers every address from 5C:D5:B5:00:00:00 to 5C:D5:B5:FF:FF:FF, or 16,777,216 addresses in total. It is also written 5C-D5-B5.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in 5C:D5:B5:00:00:00 that is 5C:D5:B5 — 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 WiSiYiLink Technology Co.,Ltd located?: Shenzhen WiSiYiLink Technology Co.,Ltd is listed at Building a 3, huafengzhigu Yuanshan hi tech Industrial Park, No.62, Yinhe Road, he'ao community, Yuanshan street, Longgang District Shenzhen CN 518100 in the IEEE OUI registry entry for 5C:D5:B5. This is the address the organization registered with the IEEE, which may differ from its current operating address.