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      Twilio Best Practices for Call Volume & Number Health

      Protect your phone numbers from being flagged as SPAM, maximize answer rates, and ensure long-term deliverability. Read through the information below:

      Twilio Best Practices

       

      Not a visual learner? No problem!
      Here’s a straightforward, step-by-step guide in text form:

      📞 Twilio Best Practices for Call Volume & Number Health

      Goal: Protect your phone numbers from being flagged as SPAM, maximize answer rates, and ensure long-term deliverability.

      🔹 Starting with Cold Data

      • Begin at 50–100 calls per day per number.

      • Monitor daily in Twilio dashboards:

        • Complaints

        • Failed calls (disconnected/invalid numbers)

      • If metrics stay low → increase in increments of 25–50 calls per day.

      • Rule of thumb: Complaints should be <20%, ideally <10%, before scaling up.

      🔹 Using Higher-Confidence Data (Opted-In, Reliable Sources like Clay, SeamlessAi, ZoomInfo)

      • Start at 150–200 calls per day.

      • Monitor complaint & failed call rate:

        • If stable between 10–20%, scale to 300–400 calls per day.

      🔹 Maximum Call Volume Per Number

      • Do not exceed 500 calls per day per number.

      • For higher volumes:

        • Use multiple numbers.

        • Spread calls evenly across them.

      🔹 Data Quality & Compliance

      • Use only opted-in data whenever possible.

      • Keep failed call rate below 5%.

      • Aim for answer rates of 10–20%.

      • Ensure calls last longer than 30 seconds.

        • Calls <30 seconds look like SPAM to carriers.

      🔹 Number Warm-Up Strategy

      • Treat new numbers like warming up an email domain.

      • Start 10–15 calls per day.

      • Add +5 calls per day if complaints remain below 20%.

      • Build consistency over at least 2 weeks before scaling aggressively.

      ✅ Key Takeaway:
      Always start low and scale slowly, no matter the data quality. Monitoring daily metrics is essential to protecting your numbers, avoiding SPAM flags, and building trust with carriers.

       

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