Which company owns MAC address prefix EC:65:CC?

MAC address prefix EC:65:CC is registered to Panasonic Automotive Systems Company of America in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with EC:65:CC has a network interface built by Panasonic Automotive Systems Company of America.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in EC:65:CC:00:00:00 that is EC:65:CC — 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.

How many MAC prefixes does Panasonic Automotive Systems Company of America own?

Panasonic Automotive Systems Company of America holds 3 OUI prefixes in the IEEE registry, of which EC:65:CC is one. A device made by Panasonic Automotive Systems Company of America could carry a MAC address from any of them.

Panasonic Automotive Systems Company of America

MAC address prefix EC:65:CC is registered to Panasonic Automotive Systems Company of America in the IEEE OUI registry. Any device whose MAC address begins with EC:65:CC has a network interface built by Panasonic Automotive Systems Company of America. 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:65:CC:00:00:00 to EC:65:CC:FF:FF:FF.

OUI prefix: EC:65:CC
Hyphen form: EC-65-CC
MAC range: EC:65:CC:00:00:00 – EC:65:CC:FF:FF:FF
Addresses in block: 16,777,216
Organization: Panasonic Automotive Systems Company of America
Address: 776 Highway 74 South Peachtree City null US 30269
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.

Other prefixes from Panasonic Automotive Systems Company of America

Panasonic Automotive Systems Company of America holds 3 OUI prefixes in total. A device with this exact prefix could just as well carry any of these:

Assignment history (2)

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

2018-12-21Assigned to "Panasonic Automotive Systems Company of America"
archived source →
2026-07-17Assigned to "Panasonic Automotive Systems Company of America"

Nearby in the registry

The prefixes assigned immediately before and after EC:65:CC:

FAQ

Which company owns MAC address prefix EC:65:CC?: MAC address prefix EC:65:CC is registered to Panasonic Automotive Systems Company of America in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with EC:65:CC has a network interface built by Panasonic Automotive Systems Company of America.
What is the OUI EC:65:CC?: EC:65:CC is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Panasonic Automotive Systems Company of America. It covers every address from EC:65:CC:00:00:00 to EC:65:CC:FF:FF:FF, or 16,777,216 addresses in total. It is also written EC-65-CC.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in EC:65:CC:00:00:00 that is EC:65:CC — 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 Panasonic Automotive Systems Company of America located?: Panasonic Automotive Systems Company of America is listed at 776 Highway 74 South Peachtree City null US 30269 in the IEEE OUI registry entry for EC:65:CC. This is the address the organization registered with the IEEE, which may differ from its current operating address.
How many MAC prefixes does Panasonic Automotive Systems Company of America own?: Panasonic Automotive Systems Company of America holds 3 OUI prefixes in the IEEE registry, of which EC:65:CC is one. A device made by Panasonic Automotive Systems Company of America could carry a MAC address from any of them.