Editor's note: this 2022 article was refreshed in July 2026 with current Tychron links.
What it is
AT&T and T-Mobile (including the former Sprint Network) are currently adjusting the throughput caps they’ve historically enforced on local 10-digit long code (10DLC) messaging for business senders, known as Application-to-Peer (A2P) programs. There are new registration requirements and additional surcharge fees will be introduced with this change-up.
In February 2020, Verizon was the first to implement its revised 10DLC A2P program. Verizon’s new program supports additional throughput to its subscribers on all local phone numbers with the addition of A2P surcharge fees.
How does it benefit me?
The throughput limits will vary, but message velocity to properly opted-in subscribers in registered campaigns should be better than the traditional 1 message per second.
What happens if I’m not registered?
Starting June 1st, 2021, AT&T will begin to block messages from 10DLC numbers that do not have a registered campaign ID. T-Mobile is also considering imposing significant penalty fees on your messages if they are sent from an unregistered number and may even permanently blacklist your numbers from sending messages to any of the carrier’s subscribers.
The campaign registry and participating Campaign Service Providers (CSPs) like Tychron are now working with brands and businesses to register their messaging campaigns.
Keep reading
Disclaimer: This article is general information, not legal or compliance advice. Carrier rules, CTIA guidelines, and 10DLC and toll-free requirements change often and are enforced at the discretion of the carriers and their vetting partners. Tychron makes no warranty as to its accuracy or completeness and accepts no liability for actions taken in reliance on it — confirm current requirements with the relevant authorities and your own counsel before acting.