Which company owns MAC address prefix 00:16:3B?

MAC address prefix 00:16:3B is registered to Communications & Power Industries in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 00:16:3B has a network interface built by Communications & Power Industries.

What is the OUI 00:16:3B?

00:16:3B is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Communications & Power Industries. It covers every address from 00:16:3B:00:00:00 to 00:16:3B:FF:FF:FF, or 16,777,216 addresses in total. It is also written 00-16-3B.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in 00:16:3B:00:00:00 that is 00:16:3B — 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 Communications & Power Industries located?

Communications & Power Industries is listed at Suite , 60 Decibel Road State College PA US 16801 in the IEEE OUI registry entry for 00:16:3B. This is the address the organization registered with the IEEE, which may differ from its current operating address.

How many MAC prefixes does Communications & Power Industries own?

Communications & Power Industries holds 2 OUI prefixes in the IEEE registry, of which 00:16:3B is one. A device made by Communications & Power Industries could carry a MAC address from any of them.

Communications & Power Industries

MAC address prefix 00:16:3B is registered to Communications & Power Industries in the IEEE OUI registry. Any device whose MAC address begins with 00:16:3B has a network interface built by Communications & Power Industries. 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 00:16:3B:00:00:00 to 00:16:3B:FF:FF:FF.

OUI prefix: 00:16:3B
Hyphen form: 00-16-3B
MAC range: 00:16:3B:00:00:00 – 00:16:3B:FF:FF:FF
Addresses in block: 16,777,216
Organization: Communications & Power Industries
Address: Suite , 60 Decibel Road State College PA US 16801
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 Communications & Power Industries

Communications & Power Industries holds 2 OUI prefixes in total. A device with this exact prefix could just as well carry any of these:

00:0B:4E

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 "VertexRSI/General Dynamics"
archived source →
2020-11-28Renamed from "VertexRSI/General Dynamics" to "Communications & Power Industries"
archived source →
2026-07-17Assigned to "Communications & Power Industries"

Nearby in the registry

The prefixes assigned immediately before and after 00:16:3B:

FAQ

Which company owns MAC address prefix 00:16:3B?: MAC address prefix 00:16:3B is registered to Communications & Power Industries in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 00:16:3B has a network interface built by Communications & Power Industries.
What is the OUI 00:16:3B?: 00:16:3B is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Communications & Power Industries. It covers every address from 00:16:3B:00:00:00 to 00:16:3B:FF:FF:FF, or 16,777,216 addresses in total. It is also written 00-16-3B.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in 00:16:3B:00:00:00 that is 00:16:3B — 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 Communications & Power Industries located?: Communications & Power Industries is listed at Suite , 60 Decibel Road State College PA US 16801 in the IEEE OUI registry entry for 00:16:3B. This is the address the organization registered with the IEEE, which may differ from its current operating address.
How many MAC prefixes does Communications & Power Industries own?: Communications & Power Industries holds 2 OUI prefixes in the IEEE registry, of which 00:16:3B is one. A device made by Communications & Power Industries could carry a MAC address from any of them.