Which company owns MAC address prefix DC:F1:44?

MAC address prefix DC:F1:44 is registered to Ocean Solution Technology in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with DC:F1:44 has a network interface built by Ocean Solution Technology.

What is the OUI DC:F1:44?

DC:F1:44 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Ocean Solution Technology. It covers every address from DC:F1:44:00:00:00 to DC:F1:44:FF:FF:FF, or 16,777,216 addresses in total. It is also written DC-F1-44.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in DC:F1:44:00:00:00 that is DC:F1:44 — 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 Ocean Solution Technology located?

Ocean Solution Technology is listed at 203-1 Arifukucho Sasebo City NAGASAKI JP 859-3241 in the IEEE OUI registry entry for DC:F1:44. This is the address the organization registered with the IEEE, which may differ from its current operating address.

Ocean Solution Technology

MAC address prefix DC:F1:44 is registered to Ocean Solution Technology in the IEEE OUI registry. Any device whose MAC address begins with DC:F1:44 has a network interface built by Ocean Solution Technology. 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 DC:F1:44:00:00:00 to DC:F1:44:FF:FF:FF.

OUI prefix: DC:F1:44
Hyphen form: DC-F1-44
MAC range: DC:F1:44:00:00:00 – DC:F1:44:FF:FF:FF
Addresses in block: 16,777,216
Organization: Ocean Solution Technology
Address: 203-1 Arifukucho Sasebo City NAGASAKI JP 859-3241
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.

2026-06-20Assigned to "Ocean Solution Technology"
archived source →
2026-07-17Assigned to "Ocean Solution Technology"

Nearby in the registry

The prefixes assigned immediately before and after DC:F1:44:

FAQ

Which company owns MAC address prefix DC:F1:44?: MAC address prefix DC:F1:44 is registered to Ocean Solution Technology in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with DC:F1:44 has a network interface built by Ocean Solution Technology.
What is the OUI DC:F1:44?: DC:F1:44 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Ocean Solution Technology. It covers every address from DC:F1:44:00:00:00 to DC:F1:44:FF:FF:FF, or 16,777,216 addresses in total. It is also written DC-F1-44.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in DC:F1:44:00:00:00 that is DC:F1:44 — 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 Ocean Solution Technology located?: Ocean Solution Technology is listed at 203-1 Arifukucho Sasebo City NAGASAKI JP 859-3241 in the IEEE OUI registry entry for DC:F1:44. This is the address the organization registered with the IEEE, which may differ from its current operating address.