How to Prevent and Resolve Spam Flags
How to Prevent and Resolve Spam Flags on Twilio Numbers
Twilio numbers can sometimes be flagged as spam if previously misused by others. To minimize this risk and ensure your outbound calls are not blocked or labeled as spam, follow these recommendations:
Before Purchasing a Twilio Number:
Perform preliminary checks using these resources:
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Note: Nomorobo typically requires a paid subscription for detailed checks, but you can still verify basic information.
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Additionally, perform a Google search for the number in quotes (e.g., "614-758-2315"). If it appears on spam complaint websites, avoid purchasing it.
After Purchasing a Twilio Number:
If your number is flagged as spam after purchase, register it with phone carriers using the Free Caller Registry.
For detailed guidance, refer to Follow Up Boss Caller ID Spam Guide.
It may take about one week for the spam designation to clear after registration.
Best Practices for Frequent Outbound Calls:
Use Twilio’s number pool feature to distribute outbound calls across multiple phone numbers. The ideal ratio is:
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One phone number per 50-70 outbound calls per day.
For example, if you average 200 outbound calls daily, maintain at least 3-4 phone numbers in your number pool.