Which company owns MAC address prefix EC:83:B7?

MAC address prefix EC:83:B7 is registered to PUWELL CLOUD TECH LIMITED in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with EC:83:B7 has a network interface built by PUWELL CLOUD TECH LIMITED.

What is the OUI EC:83:B7?

EC:83:B7 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to PUWELL CLOUD TECH LIMITED. It covers every address from EC:83:B7:00:00:00 to EC:83:B7:FF:FF:FF, or 16,777,216 addresses in total. It is also written EC-83-B7.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in EC:83:B7:00:00:00 that is EC:83:B7 — 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 PUWELL CLOUD TECH LIMITED located?

PUWELL CLOUD TECH LIMITED is listed at Room 1702, 17/F, Hong Kong Trade Centre, Nos. 161-167 Des Voeux Road Central, Hong Kong Hong Kong HK 999077 in the IEEE OUI registry entry for EC:83:B7. This is the address the organization registered with the IEEE, which may differ from its current operating address.

PUWELL CLOUD TECH LIMITED

MAC address prefix EC:83:B7 is registered to PUWELL CLOUD TECH LIMITED in the IEEE OUI registry. Any device whose MAC address begins with EC:83:B7 has a network interface built by PUWELL CLOUD TECH 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 EC:83:B7:00:00:00 to EC:83:B7:FF:FF:FF.

OUI prefix: EC:83:B7
Hyphen form: EC-83-B7
MAC range: EC:83:B7:00:00:00 – EC:83:B7:FF:FF:FF
Addresses in block: 16,777,216
Organization: PUWELL CLOUD TECH LIMITED
Address: Room 1702, 17/F, Hong Kong Trade Centre, Nos. 161-167 Des Voeux Road Central, Hong Kong 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.

2022-09-05Assigned to "PUWELL CLOUD TECH LIMITED"
archived source →
2026-07-17Assigned to "PUWELL CLOUD TECH LIMITED"

Nearby in the registry

The prefixes assigned immediately before and after EC:83:B7:

FAQ

Which company owns MAC address prefix EC:83:B7?: MAC address prefix EC:83:B7 is registered to PUWELL CLOUD TECH LIMITED in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with EC:83:B7 has a network interface built by PUWELL CLOUD TECH LIMITED.
What is the OUI EC:83:B7?: EC:83:B7 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to PUWELL CLOUD TECH LIMITED. It covers every address from EC:83:B7:00:00:00 to EC:83:B7:FF:FF:FF, or 16,777,216 addresses in total. It is also written EC-83-B7.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in EC:83:B7:00:00:00 that is EC:83:B7 — 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 PUWELL CLOUD TECH LIMITED located?: PUWELL CLOUD TECH LIMITED is listed at Room 1702, 17/F, Hong Kong Trade Centre, Nos. 161-167 Des Voeux Road Central, Hong Kong Hong Kong HK 999077 in the IEEE OUI registry entry for EC:83:B7. This is the address the organization registered with the IEEE, which may differ from its current operating address.