Which company owns MAC address prefix EC:01:33?

MAC address prefix EC:01:33 is registered to TRINUS SYSTEMS INC. in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with EC:01:33 has a network interface built by TRINUS SYSTEMS INC..

What is the OUI EC:01:33?

EC:01:33 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to TRINUS SYSTEMS INC.. It covers every address from EC:01:33:00:00:00 to EC:01:33:FF:FF:FF, or 16,777,216 addresses in total. It is also written EC-01-33.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in EC:01:33:00:00:00 that is EC:01:33 — 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 TRINUS SYSTEMS INC. located?

TRINUS SYSTEMS INC. is listed at UNITECH VENTURE TOWN SUITE 801 GOYANG-SI GYEONGGI-DO KR 410-722 in the IEEE OUI registry entry for EC:01:33. This is the address the organization registered with the IEEE, which may differ from its current operating address.

TRINUS SYSTEMS INC.

MAC address prefix EC:01:33 is registered to TRINUS SYSTEMS INC. in the IEEE OUI registry. Any device whose MAC address begins with EC:01:33 has a network interface built by TRINUS SYSTEMS INC.. 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:01:33:00:00:00 to EC:01:33:FF:FF:FF.

OUI prefix: EC:01:33
Hyphen form: EC-01-33
MAC range: EC:01:33:00:00:00 – EC:01:33:FF:FF:FF
Addresses in block: 16,777,216
Organization: TRINUS SYSTEMS INC.
Address: UNITECH VENTURE TOWN SUITE 801 GOYANG-SI GYEONGGI-DO KR 410-722
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 "TRINUS SYSTEMS INC."
archived source →
2026-07-17Assigned to "TRINUS SYSTEMS INC."

Nearby in the registry

The prefixes assigned immediately before and after EC:01:33:

FAQ

Which company owns MAC address prefix EC:01:33?: MAC address prefix EC:01:33 is registered to TRINUS SYSTEMS INC. in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with EC:01:33 has a network interface built by TRINUS SYSTEMS INC..
What is the OUI EC:01:33?: EC:01:33 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to TRINUS SYSTEMS INC.. It covers every address from EC:01:33:00:00:00 to EC:01:33:FF:FF:FF, or 16,777,216 addresses in total. It is also written EC-01-33.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in EC:01:33:00:00:00 that is EC:01:33 — 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 TRINUS SYSTEMS INC. located?: TRINUS SYSTEMS INC. is listed at UNITECH VENTURE TOWN SUITE 801 GOYANG-SI GYEONGGI-DO KR 410-722 in the IEEE OUI registry entry for EC:01:33. This is the address the organization registered with the IEEE, which may differ from its current operating address.