Which company owns MAC address prefix E4:4E:76?

MAC address prefix E4:4E:76 is registered to CHAMPIONTECH ENTERPRISE (SHENZHEN) INC in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with E4:4E:76 has a network interface built by CHAMPIONTECH ENTERPRISE (SHENZHEN) INC.

What is the OUI E4:4E:76?

E4:4E:76 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to CHAMPIONTECH ENTERPRISE (SHENZHEN) INC. It covers every address from E4:4E:76:00:00:00 to E4:4E:76:FF:FF:FF, or 16,777,216 addresses in total. It is also written E4-4E-76.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in E4:4E:76:00:00:00 that is E4:4E:76 — 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 CHAMPIONTECH ENTERPRISE (SHENZHEN) INC located?

CHAMPIONTECH ENTERPRISE (SHENZHEN) INC is listed at Against Office of Dong-Zhou Residential Committee Guang Ming Shenzhen CN 518000 in the IEEE OUI registry entry for E4:4E:76. This is the address the organization registered with the IEEE, which may differ from its current operating address.

CHAMPIONTECH ENTERPRISE (SHENZHEN) INC

MAC address prefix E4:4E:76 is registered to CHAMPIONTECH ENTERPRISE (SHENZHEN) INC in the IEEE OUI registry. Any device whose MAC address begins with E4:4E:76 has a network interface built by CHAMPIONTECH ENTERPRISE (SHENZHEN) INC. 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 E4:4E:76:00:00:00 to E4:4E:76:FF:FF:FF.

OUI prefix: E4:4E:76
Hyphen form: E4-4E-76
MAC range: E4:4E:76:00:00:00 – E4:4E:76:FF:FF:FF
Addresses in block: 16,777,216
Organization: CHAMPIONTECH ENTERPRISE (SHENZHEN) INC
Address: Against Office of Dong-Zhou Residential Committee Guang Ming Shenzhen CN 518000
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.

2018-12-21Assigned to "CHAMPIONTECH ENTERPRISE (SHENZHEN) INC"
archived source →
2026-07-17Assigned to "CHAMPIONTECH ENTERPRISE (SHENZHEN) INC"

Nearby in the registry

The prefixes assigned immediately before and after E4:4E:76:

FAQ

Which company owns MAC address prefix E4:4E:76?: MAC address prefix E4:4E:76 is registered to CHAMPIONTECH ENTERPRISE (SHENZHEN) INC in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with E4:4E:76 has a network interface built by CHAMPIONTECH ENTERPRISE (SHENZHEN) INC.
What is the OUI E4:4E:76?: E4:4E:76 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to CHAMPIONTECH ENTERPRISE (SHENZHEN) INC. It covers every address from E4:4E:76:00:00:00 to E4:4E:76:FF:FF:FF, or 16,777,216 addresses in total. It is also written E4-4E-76.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in E4:4E:76:00:00:00 that is E4:4E:76 — 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 CHAMPIONTECH ENTERPRISE (SHENZHEN) INC located?: CHAMPIONTECH ENTERPRISE (SHENZHEN) INC is listed at Against Office of Dong-Zhou Residential Committee Guang Ming Shenzhen CN 518000 in the IEEE OUI registry entry for E4:4E:76. This is the address the organization registered with the IEEE, which may differ from its current operating address.