How to port a number into Klaviyo

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You will learn

Learn how to port an SMS sending number into Klaviyo. 

Before you begin

Porting can take around 4 weeks. When migrating to Klaviyo, please build in time for this process. 

Note that porting a number will result in the loss of any voice capabilities.

Types of numbers that can be ported

Type of number

Can it be ported? 



Short code


Shared short code


Branded sender ID

No, but you can set the ID to be the same as your previous one

Long code


Port a toll-free number

  1. Navigate to Settings.
  2. Click SMS.
  3. Click into the Request Additional Numbers dropdown.
    The SMS settings page showing the Request Additional Numbers dropdown in the Sending Numbers section
  4. Select Port an Existing Number.
  5. Click Submit Port Request.
    Modal to submit a port request

Port a short code

  1. Navigate to Settings.
  2. Click SMS.
  3. Click Activate for the country your short code is for (e.g., if you have a US short code, click Activate where "United States" is the supported region(.
  4. Select Short Code from the list of numbers.
  5. Click Complete Order to access the application.


After you submit your port request, you can expect to be contacted by a Klaviyo representative. After someone reaches out and you submit all required information, the porting process begins: 

  • For toll-free numbers, porting can take 2 to 4 weeks to complete.
  • For short codes, porting can take 6 to 10 weeks to complete. 

Additional resources

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