Which company owns MAC address prefix BC:45:8C?

MAC address prefix BC:45:8C is registered to Shenzhen Topwise Communication Co.,Ltd in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with BC:45:8C has a network interface built by Shenzhen Topwise Communication Co.,Ltd.

What is the OUI BC:45:8C?

BC:45:8C is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Shenzhen Topwise Communication Co.,Ltd. It covers every address from BC:45:8C:00:00:00 to BC:45:8C:FF:FF:FF, or 16,777,216 addresses in total. It is also written BC-45-8C.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in BC:45:8C:00:00:00 that is BC:45:8C — 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 Topwise Communication Co.,Ltd located?

Shenzhen Topwise Communication Co.,Ltd is listed at 5/F,Shengtang Building East Block,Tairan Road 9,Futian District,Shenzhen Shenzhen CN 518042 in the IEEE OUI registry entry for BC:45:8C. This is the address the organization registered with the IEEE, which may differ from its current operating address.

Shenzhen Topwise Communication Co.,Ltd

MAC address prefix BC:45:8C is registered to Shenzhen Topwise Communication Co.,Ltd in the IEEE OUI registry. Any device whose MAC address begins with BC:45:8C has a network interface built by Shenzhen Topwise Communication 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 BC:45:8C:00:00:00 to BC:45:8C:FF:FF:FF.

OUI prefix: BC:45:8C
Hyphen form: BC-45-8C
MAC range: BC:45:8C:00:00:00 – BC:45:8C:FF:FF:FF
Addresses in block: 16,777,216
Organization: Shenzhen Topwise Communication Co.,Ltd
Address: 5/F,Shengtang Building East Block,Tairan Road 9,Futian District,Shenzhen Shenzhen CN 518042
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.

2022-09-05Assigned to "Shenzhen Topwise Communication Co.,Ltd"
archived source →
2026-07-17Assigned to "Shenzhen Topwise Communication Co.,Ltd"

Nearby in the registry

The prefixes assigned immediately before and after BC:45:8C:

FAQ

Which company owns MAC address prefix BC:45:8C?: MAC address prefix BC:45:8C is registered to Shenzhen Topwise Communication Co.,Ltd in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with BC:45:8C has a network interface built by Shenzhen Topwise Communication Co.,Ltd.
What is the OUI BC:45:8C?: BC:45:8C is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Shenzhen Topwise Communication Co.,Ltd. It covers every address from BC:45:8C:00:00:00 to BC:45:8C:FF:FF:FF, or 16,777,216 addresses in total. It is also written BC-45-8C.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in BC:45:8C:00:00:00 that is BC:45:8C — 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 Topwise Communication Co.,Ltd located?: Shenzhen Topwise Communication Co.,Ltd is listed at 5/F,Shengtang Building East Block,Tairan Road 9,Futian District,Shenzhen Shenzhen CN 518042 in the IEEE OUI registry entry for BC:45:8C. This is the address the organization registered with the IEEE, which may differ from its current operating address.