A2P 10DLC | Mar. 18, 2026
Increased MMS rate limits for A2P 10DLC Phone Numbers in the U.S. starting March 18, 2026
Starting March 18, 2026, MMS rate limits for Application-to-Person (A2P) U.S. 10-digit long code (10DLC) numbers are determined by Brand Trust Score and Campaign use case, replacing the previous fixed account-level cap of 1 message per second (MPS).
Brand Trust Score is a score Twilio assigns based on the quality and completeness of a customer's Brand and Campaign registration. Higher scores unlock higher throughput.
What the new MPS tiers look like
For most registered campaign types (Declared and Mixed/Marketing), MMS messages per second (MPS) now scales with Brand Trust Score:
- Trust Score 75 or above: up to 40 MPS per major carrier (AT&T, T-Mobile, Verizon)
- Trust Score 50–74: up to 20 MPS per major carrier
- Trust Score below 50: up to 5 MPS per major carrier
Special use cases have their own fixed MPS allocations that aren’t affected by Trust Score. Accounts registered as Sole Proprietor Brands have a fixed allocation of 0.5 MPS per number, regardless of Trust Score or campaign type.
What customers should do
Customers sending MMS using U.S. 10DLC numbers should review the updated MPS tables in the 10DLC MMS Campaign Rate Limits Help Center article to understand their throughput allocation based on their brand and campaign registration.
Need a hand?
These resources will help: