Which company owns MAC address prefix 28:83:28?

MAC address prefix 28:83:28 is registered to EMALDO TECHNOLOGY(HK)LIMITED in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 28:83:28 has a network interface built by EMALDO TECHNOLOGY(HK)LIMITED.

What is the OUI 28:83:28?

28:83:28 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to EMALDO TECHNOLOGY(HK)LIMITED. It covers every address from 28:83:28:00:00:00 to 28:83:28:FF:FF:FF, or 16,777,216 addresses in total. It is also written 28-83-28.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in 28:83:28:00:00:00 that is 28:83:28 — 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 EMALDO TECHNOLOGY(HK)LIMITED located?

EMALDO TECHNOLOGY(HK)LIMITED is listed at 13/F., Golden Dragon Comm. Bldg., 522 Nathan Road, Yau Ma Tei, Kowloon HONG KONG HK 999077 in the IEEE OUI registry entry for 28:83:28. This is the address the organization registered with the IEEE, which may differ from its current operating address.

EMALDO TECHNOLOGY(HK)LIMITED

MAC address prefix 28:83:28 is registered to EMALDO TECHNOLOGY(HK)LIMITED in the IEEE OUI registry. Any device whose MAC address begins with 28:83:28 has a network interface built by EMALDO TECHNOLOGY(HK)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 28:83:28:00:00:00 to 28:83:28:FF:FF:FF.

OUI prefix: 28:83:28
Hyphen form: 28-83-28
MAC range: 28:83:28:00:00:00 – 28:83:28:FF:FF:FF
Addresses in block: 16,777,216
Organization: EMALDO TECHNOLOGY(HK)LIMITED
Address: 13/F., Golden Dragon Comm. Bldg., 522 Nathan Road, Yau Ma Tei, Kowloon 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.

2026-01-08Assigned to "EMALDO TECHNOLOGY(HK)LIMITED"
archived source →
2026-07-17Assigned to "EMALDO TECHNOLOGY(HK)LIMITED"

Nearby in the registry

The prefixes assigned immediately before and after 28:83:28:

FAQ

Which company owns MAC address prefix 28:83:28?: MAC address prefix 28:83:28 is registered to EMALDO TECHNOLOGY(HK)LIMITED in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 28:83:28 has a network interface built by EMALDO TECHNOLOGY(HK)LIMITED.
What is the OUI 28:83:28?: 28:83:28 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to EMALDO TECHNOLOGY(HK)LIMITED. It covers every address from 28:83:28:00:00:00 to 28:83:28:FF:FF:FF, or 16,777,216 addresses in total. It is also written 28-83-28.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in 28:83:28:00:00:00 that is 28:83:28 — 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 EMALDO TECHNOLOGY(HK)LIMITED located?: EMALDO TECHNOLOGY(HK)LIMITED is listed at 13/F., Golden Dragon Comm. Bldg., 522 Nathan Road, Yau Ma Tei, Kowloon HONG KONG HK 999077 in the IEEE OUI registry entry for 28:83:28. This is the address the organization registered with the IEEE, which may differ from its current operating address.