Occasionally AT&T, Verizon and T-Mobile will block calls that they feel fit typical robocalling campaign characteristics, such as high-volume, short-duration calls originating from a single number.
There are many legitimate use cases for high-volume, short-duration calls:
- school closing notifications
- weather alerts
- patient reminders.
These are entirely valid and legitimate use cases where recipients want to receive these calls and have opted-in to do so. However, when viewed en-masse at the network level, they can look like illegal robocalling.
In order to ensure your outbound calls aren't miscategorized as unwanted or fraudulent calls by the wireless carriers, we highly encourage you to proactively request whitelisting of legitimate outbound calling use cases from each of the major wireless carriers.
Here are the websites where you can submit whitelisting requests: