Which company owns MAC address prefix C4:CD:45?

MAC address prefix C4:CD:45 is registered to Beijing Boomsense Technology CO.,LTD. in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with C4:CD:45 has a network interface built by Beijing Boomsense Technology CO.,LTD..

What is the OUI C4:CD:45?

C4:CD:45 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Beijing Boomsense Technology CO.,LTD.. It covers every address from C4:CD:45:00:00:00 to C4:CD:45:FF:FF:FF, or 16,777,216 addresses in total. It is also written C4-CD-45.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in C4:CD:45:00:00:00 that is C4:CD:45 — 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 Beijing Boomsense Technology CO.,LTD. located?

Beijing Boomsense Technology CO.,LTD. is listed at 803 Building 4 INTERWEST Business Center,No.9 South Shouti Road ,HaidianDistrict, Beijing CN 100048 in the IEEE OUI registry entry for C4:CD:45. This is the address the organization registered with the IEEE, which may differ from its current operating address.

Beijing Boomsense Technology CO.,LTD.

MAC address prefix C4:CD:45 is registered to Beijing Boomsense Technology CO.,LTD. in the IEEE OUI registry. Any device whose MAC address begins with C4:CD:45 has a network interface built by Beijing Boomsense 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 C4:CD:45:00:00:00 to C4:CD:45:FF:FF:FF.

OUI prefix: C4:CD:45
Hyphen form: C4-CD-45
MAC range: C4:CD:45:00:00:00 – C4:CD:45:FF:FF:FF
Addresses in block: 16,777,216
Organization: Beijing Boomsense Technology CO.,LTD.
Address: 803 Building 4 INTERWEST Business Center,No.9 South Shouti Road ,HaidianDistrict, Beijing CN 100048
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 "Beijing Boomsense Technology CO.,LTD."
archived source →
2026-07-17Assigned to "Beijing Boomsense Technology CO.,LTD."

Nearby in the registry

The prefixes assigned immediately before and after C4:CD:45:

FAQ

Which company owns MAC address prefix C4:CD:45?: MAC address prefix C4:CD:45 is registered to Beijing Boomsense Technology CO.,LTD. in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with C4:CD:45 has a network interface built by Beijing Boomsense Technology CO.,LTD..
What is the OUI C4:CD:45?: C4:CD:45 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Beijing Boomsense Technology CO.,LTD.. It covers every address from C4:CD:45:00:00:00 to C4:CD:45:FF:FF:FF, or 16,777,216 addresses in total. It is also written C4-CD-45.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in C4:CD:45:00:00:00 that is C4:CD:45 — 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 Beijing Boomsense Technology CO.,LTD. located?: Beijing Boomsense Technology CO.,LTD. is listed at 803 Building 4 INTERWEST Business Center,No.9 South Shouti Road ,HaidianDistrict, Beijing CN 100048 in the IEEE OUI registry entry for C4:CD:45. This is the address the organization registered with the IEEE, which may differ from its current operating address.