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

MAC address prefix C4:45:EC is registered to Shanghai Yali Electron Co.,LTD in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with C4:45:EC has a network interface built by Shanghai Yali Electron Co.,LTD.

What is the OUI C4:45:EC?

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

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in C4:45:EC:00:00:00 that is C4:45:EC — 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 Shanghai Yali Electron Co.,LTD located?

Shanghai Yali Electron Co.,LTD is listed at Room 1-607 Shanghai Shanghai US 201100 in the IEEE OUI registry entry for C4:45:EC. This is the address the organization registered with the IEEE, which may differ from its current operating address.

Shanghai Yali Electron Co.,LTD

MAC address prefix C4:45:EC is registered to Shanghai Yali Electron Co.,LTD in the IEEE OUI registry. Any device whose MAC address begins with C4:45:EC has a network interface built by Shanghai Yali Electron 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 C4:45:EC:00:00:00 to C4:45:EC:FF:FF:FF.

OUI prefix: C4:45:EC
Hyphen form: C4-45-EC
MAC range: C4:45:EC:00:00:00 – C4:45:EC:FF:FF:FF
Addresses in block: 16,777,216
Organization: Shanghai Yali Electron Co.,LTD
Address: Room 1-607 Shanghai Shanghai US 201100
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 "Shanghai Yali Electron Co.,LTD"
archived source →
2026-07-17Assigned to "Shanghai Yali Electron Co.,LTD"

Nearby in the registry

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

FAQ

Which company owns MAC address prefix C4:45:EC?: MAC address prefix C4:45:EC is registered to Shanghai Yali Electron Co.,LTD in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with C4:45:EC has a network interface built by Shanghai Yali Electron Co.,LTD.
What is the OUI C4:45:EC?: C4:45:EC is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Shanghai Yali Electron Co.,LTD. It covers every address from C4:45:EC:00:00:00 to C4:45:EC:FF:FF:FF, or 16,777,216 addresses in total. It is also written C4-45-EC.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in C4:45:EC:00:00:00 that is C4:45:EC — 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 Shanghai Yali Electron Co.,LTD located?: Shanghai Yali Electron Co.,LTD is listed at Room 1-607 Shanghai Shanghai US 201100 in the IEEE OUI registry entry for C4:45:EC. This is the address the organization registered with the IEEE, which may differ from its current operating address.