T-Mobile A2P 10DLC Daily Limit Warning Error Codes 30025, 30026, and 30027 Being Decommissioned

Starting May 21, 2026, T-Mobile A2P 10DLC daily message cap warning error codes 30025 (50% threshold), 30026 (70% threshold), and 30027 (100% of the daily limit) are being retired. These error codes will no longer fire in API error logs or webhooks, and the associated proactive warning emails will stop.

Error code 30023, which triggers when traffic hits 100% of the T-Mobile daily cap, is not affected by this change.

What do customers need to do? 

Customers who have webhooks or monitoring configured for error codes 30025, 30026, or 30027 should plan to remove those integrations before  May 21.

Customers who relied on these error codes or warning notifications to monitor daily usage can track T-Mobile message volume through Twilio Messaging Insights. Error code 30023 will continue to fire when traffic hits 100% of the T-Mobile daily cap, so customers can use that as a trigger for monitoring and alerting.

Need a hand?

These resources will help:

• Error code 30023

• T-Mobile Daily Message Limits

• Twilio Messaging Insights

• Traffic Optimization Engine