Which company owns MAC address prefix 28:25:5F?

MAC address prefix 28:25:5F is registered to HUMAX NETWORKS in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 28:25:5F has a network interface built by HUMAX NETWORKS.

What is the OUI 28:25:5F?

28:25:5F is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to HUMAX NETWORKS. It covers every address from 28:25:5F:00:00:00 to 28:25:5F:FF:FF:FF, or 16,777,216 addresses in total. It is also written 28-25-5F.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in 28:25:5F:00:00:00 that is 28:25:5F — 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 HUMAX NETWORKS located?

HUMAX NETWORKS is listed at HUMAX VILLAGE, 216Hwangsaeul-ro, Bundang gu Seongnam-si Gyeonggi-do KR 13595 in the IEEE OUI registry entry for 28:25:5F. This is the address the organization registered with the IEEE, which may differ from its current operating address.

How many MAC prefixes does HUMAX NETWORKS own?

HUMAX NETWORKS holds 5 OUI prefixes in the IEEE registry, of which 28:25:5F is one. A device made by HUMAX NETWORKS could carry a MAC address from any of them.

HUMAX NETWORKS

MAC address prefix 28:25:5F is registered to HUMAX NETWORKS in the IEEE OUI registry. Any device whose MAC address begins with 28:25:5F has a network interface built by HUMAX NETWORKS. 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 28:25:5F:00:00:00 to 28:25:5F:FF:FF:FF.

OUI prefix: 28:25:5F
Hyphen form: 28-25-5F
MAC range: 28:25:5F:00:00:00 – 28:25:5F:FF:FF:FF
Addresses in block: 16,777,216
Organization: HUMAX NETWORKS
Address: HUMAX VILLAGE, 216Hwangsaeul-ro, Bundang gu Seongnam-si Gyeonggi-do KR 13595
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.

Other prefixes from HUMAX NETWORKS

HUMAX NETWORKS holds 5 OUI prefixes in total. A device with this exact prefix could just as well carry any of these:

Assignment history (2)

The IEEE registry publishes current state only — this is the change record we've kept since we started tracking it daily.

2025-08-23Assigned to "HUMAX NETWORKS"
archived source →
2026-07-17Assigned to "HUMAX NETWORKS"

Nearby in the registry

The prefixes assigned immediately before and after 28:25:5F:

FAQ

Which company owns MAC address prefix 28:25:5F?: MAC address prefix 28:25:5F is registered to HUMAX NETWORKS in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 28:25:5F has a network interface built by HUMAX NETWORKS.
What is the OUI 28:25:5F?: 28:25:5F is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to HUMAX NETWORKS. It covers every address from 28:25:5F:00:00:00 to 28:25:5F:FF:FF:FF, or 16,777,216 addresses in total. It is also written 28-25-5F.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in 28:25:5F:00:00:00 that is 28:25:5F — 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 HUMAX NETWORKS located?: HUMAX NETWORKS is listed at HUMAX VILLAGE, 216Hwangsaeul-ro, Bundang gu Seongnam-si Gyeonggi-do KR 13595 in the IEEE OUI registry entry for 28:25:5F. This is the address the organization registered with the IEEE, which may differ from its current operating address.
How many MAC prefixes does HUMAX NETWORKS own?: HUMAX NETWORKS holds 5 OUI prefixes in the IEEE registry, of which 28:25:5F is one. A device made by HUMAX NETWORKS could carry a MAC address from any of them.