Twilio Error - 13224, 13223

Frequency: High
Common Name: Invalid Number

Issue

Twilio does not support calling this number, or the number is invalid.

The phone numbers added should follow the E.164 format and match this regex:

^\+[1-9]\d{1,14}$

Cause

Most times, customers enter numbers without the country code. Especially, when they import numbers through excel.

For example, if a customer intends to call +1 919990936 but only enters 919990936, Twilio interprets it based on the E.164 format as:

+91 9990936

This results in an invalid number, causing the error.

Resolution

1. Check if adding the correct country code makes the number valid.
2. If so, inform the customer to include the appropriate country code (e.g., +1 for US numbers).
3. Share this link with the customer for reference:
   Twilio Error 13224 Documentation