Which company owns MAC address prefix EC:93:ED?

MAC address prefix EC:93:ED is registered to DDoS-Guard LTD in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with EC:93:ED has a network interface built by DDoS-Guard LTD.

What is the OUI EC:93:ED?

EC:93:ED is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to DDoS-Guard LTD. It covers every address from EC:93:ED:00:00:00 to EC:93:ED:FF:FF:FF, or 16,777,216 addresses in total. It is also written EC-93-ED.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in EC:93:ED:00:00:00 that is EC:93:ED — 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 DDoS-Guard LTD located?

DDoS-Guard LTD is listed at goroda Volos, 6, 904 Rostov-on-Don RU 344010 in the IEEE OUI registry entry for EC:93:ED. This is the address the organization registered with the IEEE, which may differ from its current operating address.

DDoS-Guard LTD

MAC address prefix EC:93:ED is registered to DDoS-Guard LTD in the IEEE OUI registry. Any device whose MAC address begins with EC:93:ED has a network interface built by DDoS-Guard LTD. 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:93:ED:00:00:00 to EC:93:ED:FF:FF:FF.

OUI prefix: EC:93:ED
Hyphen form: EC-93-ED
MAC range: EC:93:ED:00:00:00 – EC:93:ED:FF:FF:FF
Addresses in block: 16,777,216
Organization: DDoS-Guard LTD
Address: goroda Volos, 6, 904 Rostov-on-Don RU 344010
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 "DDoS-Guard LTD"
archived source →
2026-07-17Assigned to "DDoS-Guard LTD"

Nearby in the registry

The prefixes assigned immediately before and after EC:93:ED:

FAQ

Which company owns MAC address prefix EC:93:ED?: MAC address prefix EC:93:ED is registered to DDoS-Guard LTD in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with EC:93:ED has a network interface built by DDoS-Guard LTD.
What is the OUI EC:93:ED?: EC:93:ED is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to DDoS-Guard LTD. It covers every address from EC:93:ED:00:00:00 to EC:93:ED:FF:FF:FF, or 16,777,216 addresses in total. It is also written EC-93-ED.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in EC:93:ED:00:00:00 that is EC:93:ED — 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 DDoS-Guard LTD located?: DDoS-Guard LTD is listed at goroda Volos, 6, 904 Rostov-on-Don RU 344010 in the IEEE OUI registry entry for EC:93:ED. This is the address the organization registered with the IEEE, which may differ from its current operating address.