Glossary

    Messaging Glossary — Plain-English Definitions

    Clear answers to the messaging acronyms and standards every modern business team should understand.

    RCS

    What is RCS?

    RCS (Rich Communication Services) is the modern successor to SMS that lets businesses send branded, interactive messages with images, carousels, suggested replies and verified sender identity, while falling back to SMS when the recipient's device doesn't support it.

    Read definition    10DLC

    What is 10DLC?

    10DLC (10-digit long code) is the US carrier framework for sanctioned application-to-person (A2P) SMS sent from standard 10-digit phone numbers, requiring brand and campaign registration so carriers can deliver business messages reliably and at scale.

    Read definition    A2P Messaging

    What is A2P messaging?

    A2P (application-to-person) messaging is any SMS, RCS or WhatsApp message sent from an automated business system to a consumer, including marketing, transactional notifications, two-factor authentication, appointment reminders and conversational AI replies.

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    Want to see TextConvo in action?

    See how RCS, 10DLC and A2P messaging come together in one AI-orchestrated platform.