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CallTower Solutions Center

SMS Campaign Registration FAQs

Mobile carriers are adjusting the throughput caps they've historically enforced on local messaging for business senders, also known as A2P programs, while imposing new registration requirements and requiring additional fees.  These requirements, meant to curb spam text messages, mean that companies using SMS on non-wireless numbers are required to register their company (or brand,) SMS campaigns, and associated 10DLC messaging-enabled telephone numbers.  These new requirements take effect on October 1, 2021.

What is 10DLC?

10 Digit Long Code (10DLC) is SMS or MMS text messaging using a traditional 10-digit phone number.

What is A2P?

Application-to-Person (A2P) messaging has historically been used to categorize messages sent by an application, rather than an individual.  However, mobile carriers have recently expanded their definition of A2P traffic to include any non-consumer use.  A Non-Consumer is a business, organization, or entity that uses messaging to communicate with Consumers. Examples may include, but are not limited to, large-to-small businesses, financial institutions, schools, medical practices, customer service entities, non-profit organizations, and political campaigns. 

What is an SMS Campaign? / How many Campaigns do I need to register?

Each different use of SMS within your organization is considered a separate campaign.  For example, a group of users with CT Text for communicating one-on-one with customers would be considered a campaign.  An SMS enabled queue in a contact center would be a separate campaign.  A user (or application) sending out appointment reminders would be considered a separate campaign.  Any bulk SMS messaging would be considered a separate campaign (and would require a contact center based SMS solution.  CT Text and CT Cloud Voice SMS terms of use prohibit bulk messaging.)  If you have any questions about how many campaigns you need to register, please contact

Why do I have to register my SMS Campaigns / What happens if I don't register?

Several mobile carriers have instituted potential fines of up to $10,000 per incident for non-consumer (A2P) messages sent to their subscribers prior to registration or for violation of content requirements.  By sending messages to subscribers of these mobile carriers, you are subject to these restrictions.  Some carriers are also blocking messages from unregistered numbers.

How do I register?

You should receive SMS campaign registration info during the implementation process or via an email from CallTower.  If you do not have this information, you can request by sending an email to  The form must be completed in its entirety and returned to along with a list of telephone numbers associated with your campaign.  Telephone numbers that are not registered will not be available for use with SMS or MMS features

How much does registration cost?

Registration is $90 one-time and $17 per month per campaign registration.  There is no additional charge to add DIDs to a campaign.

How will I know when I am registered? 

You will get an email response confirming that your campaign and associated telephone numbers are registered.

When will hear back that I am registered? 

You should receive confirmation of registration within two business days.

When do I need to respond to complete registration by 9/30/2021? 

We will need your registration request by end of business on 9/28/2021

What if I do not receive a response by 9/30/2021?

 Please contact CallTower Support at 800-347-5444 or

Who do I contact if I have additional questions?

Please contact CallTower Support at 800-347-5444 or

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