Sinch 10DLC Registration

Overview

10DLC (10-Digit Long Code) is the required US registration system for Application-to-Person (A2P) SMS on standard 10-digit phone numbers. You must register a brand (the sending company) and a campaign (the messaging use case) with The Campaign Registry (TCR) via Sinch before sending any US A2P SMS.

Agent Instructions

Before writing code, determine the user's goal:

1. What do you need? Register a brand, register a campaign, check status, or troubleshoot a rejection?
2. Do you already have a brand ID? If yes, skip to Step 3 (qualify) or Step 4 (campaign).
3. Registration type? SIMPLIFIED (faster, lower throughput, $10) or FULL (recommended for production, $50)?

This skill covers 10DLC only. The same Registration API also includes TFN (Toll-Free Number) verification endpoints — for toll-free registration, see the API spec directly.

This API is REST-only — there is no SDK wrapper. Use curl, fetch, axios, requests, or equivalent HTTP clients.

Getting Started