Which company owns MAC address prefix E4:62:51?

MAC address prefix E4:62:51 is registered to HAO CHENG GROUP LIMITED in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with E4:62:51 has a network interface built by HAO CHENG GROUP LIMITED.

What is the OUI E4:62:51?

E4:62:51 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to HAO CHENG GROUP LIMITED. It covers every address from E4:62:51:00:00:00 to E4:62:51:FF:FF:FF, or 16,777,216 addresses in total. It is also written E4-62-51.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in E4:62:51:00:00:00 that is E4:62:51 — 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 HAO CHENG GROUP LIMITED located?

HAO CHENG GROUP LIMITED is listed at FLAT/RM C, 06/F, BEST-TO-BEST COMMERCIAL CENTRE 32-36 FERRY STREET JORDAN KL Hong KOng HK 999077 in the IEEE OUI registry entry for E4:62:51. This is the address the organization registered with the IEEE, which may differ from its current operating address.

HAO CHENG GROUP LIMITED

MAC address prefix E4:62:51 is registered to HAO CHENG GROUP LIMITED in the IEEE OUI registry. Any device whose MAC address begins with E4:62:51 has a network interface built by HAO CHENG GROUP LIMITED. 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 E4:62:51:00:00:00 to E4:62:51:FF:FF:FF.

OUI prefix: E4:62:51
Hyphen form: E4-62-51
MAC range: E4:62:51:00:00:00 – E4:62:51:FF:FF:FF
Addresses in block: 16,777,216
Organization: HAO CHENG GROUP LIMITED
Address: FLAT/RM C, 06/F, BEST-TO-BEST COMMERCIAL CENTRE 32-36 FERRY STREET JORDAN KL Hong KOng HK 999077
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 "HAO CHENG GROUP LIMITED"
archived source →
2026-07-17Assigned to "HAO CHENG GROUP LIMITED"

Nearby in the registry

The prefixes assigned immediately before and after E4:62:51:

FAQ

Which company owns MAC address prefix E4:62:51?: MAC address prefix E4:62:51 is registered to HAO CHENG GROUP LIMITED in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with E4:62:51 has a network interface built by HAO CHENG GROUP LIMITED.
What is the OUI E4:62:51?: E4:62:51 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to HAO CHENG GROUP LIMITED. It covers every address from E4:62:51:00:00:00 to E4:62:51:FF:FF:FF, or 16,777,216 addresses in total. It is also written E4-62-51.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in E4:62:51:00:00:00 that is E4:62:51 — 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 HAO CHENG GROUP LIMITED located?: HAO CHENG GROUP LIMITED is listed at FLAT/RM C, 06/F, BEST-TO-BEST COMMERCIAL CENTRE 32-36 FERRY STREET JORDAN KL Hong KOng HK 999077 in the IEEE OUI registry entry for E4:62:51. This is the address the organization registered with the IEEE, which may differ from its current operating address.