What is CNAM?


CNAM stands for Caller ID and Name. It is a process where the caller’s name is transmitted to the receiver’s phone, which is then displayed on their screen.

Incoming and Outcoming Calls

Both incoming and outcoming calls are available with VoIP. Incoming callers are identified with either a person’s or a company’s name using the CNAM data, which is a component of public telephony. By doing so, the registration information for the phone number is linked to the caller ID information. However, the difference between incoming and outcoming calls comes when a call is made, the outbound CNAM shows the data, and when a call is received, we already know that the inbound CNAM shows the data.

How Does It Work?

The Caller ID (CLID) is sent to the carrier at the destination when a call is placed for delivery. The originating carrier does not send the Caller Name (CNAM) text data since the two services are independent.

The CNAM text data is stored in CNAM databases (also known as “Line Information Databases”), which are legitimate, reputable sources. These consolidated records are maintained by several CNAM database vendors. One or more of these may be subscribed to by carriers.

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