Which company owns MAC address prefix DC:D8:7F?

MAC address prefix DC:D8:7F is registered to Shenzhen JoinCyber Telecom Equipment Ltd in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with DC:D8:7F has a network interface built by Shenzhen JoinCyber Telecom Equipment Ltd.

What is the OUI DC:D8:7F?

DC:D8:7F is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Shenzhen JoinCyber Telecom Equipment Ltd. It covers every address from DC:D8:7F:00:00:00 to DC:D8:7F:FF:FF:FF, or 16,777,216 addresses in total. It is also written DC-D8-7F.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in DC:D8:7F:00:00:00 that is DC:D8:7F — 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 JoinCyber Telecom Equipment Ltd located?

Shenzhen JoinCyber Telecom Equipment Ltd is listed at 19CDE, Block A,JinFengBuilding,shangbu South Road,Futian District, Shenzhen Guangdong CN 518031 in the IEEE OUI registry entry for DC:D8:7F. This is the address the organization registered with the IEEE, which may differ from its current operating address.

Shenzhen JoinCyber Telecom Equipment Ltd

MAC address prefix DC:D8:7F is registered to Shenzhen JoinCyber Telecom Equipment Ltd in the IEEE OUI registry. Any device whose MAC address begins with DC:D8:7F has a network interface built by Shenzhen JoinCyber Telecom Equipment 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 DC:D8:7F:00:00:00 to DC:D8:7F:FF:FF:FF.

OUI prefix: DC:D8:7F
Hyphen form: DC-D8-7F
MAC range: DC:D8:7F:00:00:00 – DC:D8:7F:FF:FF:FF
Addresses in block: 16,777,216
Organization: Shenzhen JoinCyber Telecom Equipment Ltd
Address: 19CDE, Block A,JinFengBuilding,shangbu South Road,Futian District, Shenzhen Guangdong CN 518031
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 "Shenzhen JoinCyber Telecom Equipment Ltd"
archived source →
2026-07-17Assigned to "Shenzhen JoinCyber Telecom Equipment Ltd"

Nearby in the registry

The prefixes assigned immediately before and after DC:D8:7F:

FAQ

Which company owns MAC address prefix DC:D8:7F?: MAC address prefix DC:D8:7F is registered to Shenzhen JoinCyber Telecom Equipment Ltd in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with DC:D8:7F has a network interface built by Shenzhen JoinCyber Telecom Equipment Ltd.
What is the OUI DC:D8:7F?: DC:D8:7F is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Shenzhen JoinCyber Telecom Equipment Ltd. It covers every address from DC:D8:7F:00:00:00 to DC:D8:7F:FF:FF:FF, or 16,777,216 addresses in total. It is also written DC-D8-7F.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in DC:D8:7F:00:00:00 that is DC:D8:7F — 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 JoinCyber Telecom Equipment Ltd located?: Shenzhen JoinCyber Telecom Equipment Ltd is listed at 19CDE, Block A,JinFengBuilding,shangbu South Road,Futian District, Shenzhen Guangdong CN 518031 in the IEEE OUI registry entry for DC:D8:7F. This is the address the organization registered with the IEEE, which may differ from its current operating address.