What is CNAM?
CNAM means Caller ID Name and is the first and last name, or company name, associated with a phone number. Typically, only one CNAM record is associated with each phone number in the database.
A component of Caller ID, CNAM may be displayed to users on the receiving end of calls. However, CNAM isn’t standardized across communications service providers so specific carriers might not offer this identifier.
The CNAM might also be blocked, restricted, or ‘not available.’
How CNAM works in the U.S.
During a call, CNAM information isn’t sent. Instead, the terminating carrier is responsible for providing the Caller ID Name to call recipients.
This happens by performing a database lookup using the caller’s telephone number. However, if the data isn’t with that carrier, then the terminating carrier performs a CNAM lookup and pays the carrier hosting the caller ID name.
Caller ID vs. CNAM
Caller ID, or CLID, is the actual phone number calling you. CNAM, or Caller ID Name, on the other hand, is the text that tells you the identifying name for the number.
Together, these two pieces of information form what most people recognize as a complete caller ID display. While CLID is transmitted automatically by the carrier network, CNAM often comes from a database lookup that associates phone numbers with business or individual names.
This means the accuracy of the CNAM can vary depending on how often that database is updated and whether the caller has properly registered their number. For many businesses, CLID and CNAM can help support their overall call strategy and improve answer rates , as a clear, recognizable caller ID helps prevent their calls from being mistaken for spam or robocalls.
How to identify your caller ID with CNAM lookup
At a high level, a CNAM lookup lets you see the name associated with a specific phone number. By entering your number into a CNAM database or using a lookup service, you can verify what name is being displayed when you make outgoing calls.
Businesses often use CNAM lookups to confirm their branding is properly registered and recognized. Regularly checking your CNAM can help prevent misidentification, boost call answer rates, and build trust with customers.
How is Bandwidth involved with CNAM lookup?
When Bandwidth delivers an inbound phone call, our customers can use an API function called ‘CNAM Lookup’ to input the phone number and query the caller ID. You can think of it as a ‘do-it-yourself’ caller ID. Increasingly, AI is being leveraged by some platforms to enhance caller identification and reduce fraudulent calls.
Bandwidth makes available an API that acts as a query service for our customers to input a phone number, and return the caller ID.
Bandwidth makes it easy to manage CNAM records through either web portal or API, all with Bandwidth’s world-class customer support. The Bandwidth platform provides a user-friendly experience for managing and configuring CNAM services.
How can CNAM help fight fraud
CNAM plays a key role in preventing phone-based fraud by giving recipients more context about who’s calling. When a legitimate business displays a verified name alongside its phone number, it helps users identify and trust the call. This transparency makes it harder for scammers to impersonate reputable organizations using spoofed numbers.
By maintaining accurate CNAM information, businesses can not only protect their brand reputation but also contribute to a safer calling environment for everyone.
Terms related to CNAM
The information provided in this glossary definition does not, and is not intended to, constitute legal advice, nor does it necessarily represent Bandwidth's products or business practices. This page is for general informational purposes only.
