Which company owns MAC address prefix CC:3A:DF?

MAC address prefix CC:3A:DF is registered to Neptune Technology Group Inc. in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with CC:3A:DF has a network interface built by Neptune Technology Group Inc..

What is the OUI CC:3A:DF?

CC:3A:DF is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Neptune Technology Group Inc.. It covers every address from CC:3A:DF:00:00:00 to CC:3A:DF:FF:FF:FF, or 16,777,216 addresses in total. It is also written CC-3A-DF.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in CC:3A:DF:00:00:00 that is CC:3A:DF — 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 Neptune Technology Group Inc. located?

Neptune Technology Group Inc. is listed at 1600 AL Highway 229 S Tallassee AL US 36078 in the IEEE OUI registry entry for CC:3A:DF. This is the address the organization registered with the IEEE, which may differ from its current operating address.

Neptune Technology Group Inc.

MAC address prefix CC:3A:DF is registered to Neptune Technology Group Inc. in the IEEE OUI registry. Any device whose MAC address begins with CC:3A:DF has a network interface built by Neptune Technology Group 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 CC:3A:DF:00:00:00 to CC:3A:DF:FF:FF:FF.

OUI prefix: CC:3A:DF
Hyphen form: CC-3A-DF
MAC range: CC:3A:DF:00:00:00 – CC:3A:DF:FF:FF:FF
Addresses in block: 16,777,216
Organization: Neptune Technology Group Inc.
Address: 1600 AL Highway 229 S Tallassee AL US 36078
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.

2016-07-29Assigned to "Private"
archived source →
2021-06-10Renamed from "Private" to "Neptune Technology Group Inc."
archived source →
2026-07-17Assigned to "Neptune Technology Group Inc."

Nearby in the registry

The prefixes assigned immediately before and after CC:3A:DF:

FAQ

Which company owns MAC address prefix CC:3A:DF?: MAC address prefix CC:3A:DF is registered to Neptune Technology Group Inc. in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with CC:3A:DF has a network interface built by Neptune Technology Group Inc..
What is the OUI CC:3A:DF?: CC:3A:DF is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Neptune Technology Group Inc.. It covers every address from CC:3A:DF:00:00:00 to CC:3A:DF:FF:FF:FF, or 16,777,216 addresses in total. It is also written CC-3A-DF.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in CC:3A:DF:00:00:00 that is CC:3A:DF — 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 Neptune Technology Group Inc. located?: Neptune Technology Group Inc. is listed at 1600 AL Highway 229 S Tallassee AL US 36078 in the IEEE OUI registry entry for CC:3A:DF. This is the address the organization registered with the IEEE, which may differ from its current operating address.