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Brand Your Calls Using CNAM (Beta)

Overview

CNAM stands for Caller ID Name. CNAM is a feature in the United States public telephone network that identifies an incoming caller by a personal or business name associated with the originating phone number. CNAM is registered by the EndUser assigned the phone number through their Telephony Service Provider (Twilio).

Onboarding

There are two different options for enabling CNAM on your phone number(s):

  1. Using the Twilio Console
  2. Twilio's Trust Hub REST API.

Please note CNAM can be a maximum of 15 characters. CNAM should begin with a letter and can only contain letters, numbers, periods, commas and spaces.

CNAM Onboarding in the Twilio Console

  1. Create a Business Profile in the Console's Trust Hub and submit for vetting.
    • If you are an ISV, then you would need to create a Secondary Business Profile for your customer(s).
  2. Assign phone numbers in your account to the Business Profile.
    • This associates a single identity with the phone numbers.
  3. Create a CNAM Trust Product instance that is associated with your in the Trust Hub and submit for vetting.
  4. Select phone numbers for CNAM Registration.
    • Only those phone numbers already assigned to your Business Profile are eligible.
  5. Click Save
    • When the CNAM Trust Product reaches Twilio-Approved status, Twilio will register CNAM display name for your numbers with the CNAM authoritative databases in the United States.

NOTE: You can remove CNAM by unassigning Phone Number from CNAM Trust Product or by deleting the CNAM Trust Product.

That's it. No coding required.

CNAM Onboarding with the Trust Hub REST API

Please refer to Trust Hub Rest API Docs for more details.

1. Create a Business Profile in the Console's Trust Hub and submit for vetting.
2. Assign phone numbers in your account to the Business Profile. This associates a single identity with the phone numbers.
  • You'll need your Phone Number SID(s)
    • To find your Phone Number SIDs in the Console, go to your Dashboard. In the Project Info section, click on See all phone numbers, then click on a phone number to find the SID.
    • To find your Phone Number SIDs via API, see the Additional API Calls section below.
    • Phone Number SIDs begin with "PN".
    • In the API Call below, don't change the ChannelEndpointType. It needs to be phone-number to add a phone number to your Business Profile.
        
        
        

        Assign Phone Numbers to Your Business Profile

        3. Create CNAM Trust Product
        • Note: Do not change the policy_sid from the example below. This is a static value that will stay the same across all accounts.
        • The response will contain the SID for your Trust Product. You'll need this for several other API calls.
              
              
              

              Create CNAM Trust Product

              4. Connect your CNAM Trust Product to your Business Profile
                    
                    
                    

                    Connect your CNAM Trust Product to your Business Profile

                    5. Create CNAM End User
                    • Note: In the API Call below, don't change the Type. It needs to be cnam_information to create the proper CNAM End User resource.
                    • This API call will return the SID for the End User. You will need this in the next step.
                          
                          
                          

                          Create CNAM End User

                          6. Connect your CNAM Trust Product to your End User
                          • You will need the End User SID from the previous step.
                          • You will also need the CNAM Trust Product SID, returned from the API call in Step 3
                                
                                
                                

                                Connect your CNAM Trust Product to your End User

                                7. Add Phone Number to CNAM Trust Product
                                • You'll need the CNAM Trust Product SID, returned from the API call in Step 3
                                • You'll need the Phone Number SID(s) you assigned to your Business Profile earlier. (Note: Only those phone numbers already assigned to your Business Profile are eligible)
                                • You'll need your Buisness Profile SID. It starts with "BU".
                                • To retrieve any of these SIDs via API, see the Additional API Calls section below.
                                • Note: Don't change the ChannelEndpointType
                                      
                                      
                                      

                                      Assign Phone Numbers to your CNAM Trust Product

                                      8. Submit CNAM Trust Product
                                            
                                            
                                            

                                            Submit CNAM Trust Product for Vetting

                                            Additional Information

                                            Learn more about Business Profiles and other Trust Products in the Trust Hub Docs.

                                            After your CNAM Trust Product reaches "Twilio-Approved", the display name may take 48-72 hours to propagate to all carriers in the United States.

                                            Please note that often times, CNAM display name only appears on devices if enabled by the subscriber.

                                            For landlines, CNAM is always enabled by default.

                                            For mobile devices, some carriers, offer for free, but others require you to download their smartphone App and pay $3 per month.

                                            Mobile Network Smartphone App
                                            Verizon Call Filter Plus
                                            AT&T Call Protect Plus
                                            T-Mobile Scam Shield
                                            Sprint Call Screener

                                            Additional API Calls

                                                  
                                                  
                                                  

                                                  Get Phone Number SIDs from Parent Account

                                                        
                                                        
                                                        

                                                        Check Business Profile Phone Number Assignments

                                                              
                                                              
                                                              

                                                              Get Business Profile SIDs

                                                                    
                                                                    
                                                                    

                                                                    Check Business Profile Phone Number Assignments

                                                                          
                                                                          
                                                                          

                                                                          Fetch Trust Product SIDs

                                                                                
                                                                                
                                                                                

                                                                                Check CNAM Phone Number Assignments

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