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Increased MMS rate limits for A2P 10DLC Phone Numbers in the U.S. starting March 18, 2026
Twilio
March 18, 2026
medium impact
Twilio Enhances MMS Rate Limits for A2P 10DLC Numbers Based on Brand Trust Twilio is introducing a new approach to MMS rate limits for Application-to-Person (A2P) 10-digit long code (10DLC) phone numbers in the United States. Effective March 18, 2026, the company will replace the previous uniform rate limit of 1 message per second (MPS) with a more dynamic system that varies based on a Brand Trust Score and specific campaign use cases. This change represents a significant shift in how messaging throughput is determined for businesses using 10DLC numbers, potentially allowing more reliable and flexible messaging capabilities for different types of brands and campaigns.
Key Takeaways
- arrow_right_alt Rate limits will now be dynamically set based on individual Brand Trust Scores
- arrow_right_alt The previous fixed 1 MPS (message per second) limit is being eliminated
- arrow_right_alt Campaign use cases will play a role in determining messaging throughput