Which company owns MAC address prefix EC:23:68?

MAC address prefix EC:23:68 is registered to IntelliVoice Co.,Ltd. in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with EC:23:68 has a network interface built by IntelliVoice Co.,Ltd..

What is the OUI EC:23:68?

EC:23:68 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to IntelliVoice Co.,Ltd.. It covers every address from EC:23:68:00:00:00 to EC:23:68:FF:FF:FF, or 16,777,216 addresses in total. It is also written EC-23-68.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in EC:23:68:00:00:00 that is EC:23:68 — 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 IntelliVoice Co.,Ltd. located?

IntelliVoice Co.,Ltd. is listed at 3-6 Kioicho Chiyoda Tokyo JP 102-0094 in the IEEE OUI registry entry for EC:23:68. This is the address the organization registered with the IEEE, which may differ from its current operating address.

IntelliVoice Co.,Ltd.

MAC address prefix EC:23:68 is registered to IntelliVoice Co.,Ltd. in the IEEE OUI registry. Any device whose MAC address begins with EC:23:68 has a network interface built by IntelliVoice Co.,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:23:68:00:00:00 to EC:23:68:FF:FF:FF.

OUI prefix: EC:23:68
Hyphen form: EC-23-68
MAC range: EC:23:68:00:00:00 – EC:23:68:FF:FF:FF
Addresses in block: 16,777,216
Organization: IntelliVoice Co.,Ltd.
Address: 3-6 Kioicho Chiyoda Tokyo JP 102-0094
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 "IntelliVoice Co.,Ltd."
archived source →
2026-07-17Assigned to "IntelliVoice Co.,Ltd."

Nearby in the registry

The prefixes assigned immediately before and after EC:23:68:

FAQ

Which company owns MAC address prefix EC:23:68?: MAC address prefix EC:23:68 is registered to IntelliVoice Co.,Ltd. in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with EC:23:68 has a network interface built by IntelliVoice Co.,Ltd..
What is the OUI EC:23:68?: EC:23:68 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to IntelliVoice Co.,Ltd.. It covers every address from EC:23:68:00:00:00 to EC:23:68:FF:FF:FF, or 16,777,216 addresses in total. It is also written EC-23-68.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in EC:23:68:00:00:00 that is EC:23:68 — 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 IntelliVoice Co.,Ltd. located?: IntelliVoice Co.,Ltd. is listed at 3-6 Kioicho Chiyoda Tokyo JP 102-0094 in the IEEE OUI registry entry for EC:23:68. This is the address the organization registered with the IEEE, which may differ from its current operating address.