Which company owns MAC address prefix DC:EC:E3?

MAC address prefix DC:EC:E3 is registered to HORYS TECHNOLOGIES LLC in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with DC:EC:E3 has a network interface built by HORYS TECHNOLOGIES LLC.

What is the OUI DC:EC:E3?

DC:EC:E3 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to HORYS TECHNOLOGIES LLC. It covers every address from DC:EC:E3:00:00:00 to DC:EC:E3:FF:FF:FF, or 16,777,216 addresses in total. It is also written DC-EC-E3.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in DC:EC:E3:00:00:00 that is DC:EC:E3 — 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 HORYS TECHNOLOGIES LLC located?

HORYS TECHNOLOGIES LLC is listed at 8 the Green suite R Dover US 19901 in the IEEE OUI registry entry for DC:EC:E3. This is the address the organization registered with the IEEE, which may differ from its current operating address.

HORYS TECHNOLOGIES LLC

MAC address prefix DC:EC:E3 is registered to HORYS TECHNOLOGIES LLC in the IEEE OUI registry. Any device whose MAC address begins with DC:EC:E3 has a network interface built by HORYS TECHNOLOGIES LLC. 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:EC:E3:00:00:00 to DC:EC:E3:FF:FF:FF.

OUI prefix: DC:EC:E3
Hyphen form: DC-EC-E3
MAC range: DC:EC:E3:00:00:00 – DC:EC:E3:FF:FF:FF
Addresses in block: 16,777,216
Organization: HORYS TECHNOLOGIES LLC
Address: 8 the Green suite R Dover US 19901
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 (3)

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

2023-07-11Assigned to "LYOTECH LABS LLC"
archived source →
2024-04-16Renamed from "LYOTECH LABS LLC" to "HORYS TECHNOLOGIES LLC"
archived source →
2026-07-17Assigned to "HORYS TECHNOLOGIES LLC"

Nearby in the registry

The prefixes assigned immediately before and after DC:EC:E3:

FAQ

Which company owns MAC address prefix DC:EC:E3?: MAC address prefix DC:EC:E3 is registered to HORYS TECHNOLOGIES LLC in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with DC:EC:E3 has a network interface built by HORYS TECHNOLOGIES LLC.
What is the OUI DC:EC:E3?: DC:EC:E3 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to HORYS TECHNOLOGIES LLC. It covers every address from DC:EC:E3:00:00:00 to DC:EC:E3:FF:FF:FF, or 16,777,216 addresses in total. It is also written DC-EC-E3.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in DC:EC:E3:00:00:00 that is DC:EC:E3 — 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 HORYS TECHNOLOGIES LLC located?: HORYS TECHNOLOGIES LLC is listed at 8 the Green suite R Dover US 19901 in the IEEE OUI registry entry for DC:EC:E3. This is the address the organization registered with the IEEE, which may differ from its current operating address.