Here is a 1-paragraph summary of the text: 10DLC (10-digit long code) is a standard phone number used for application-to-person messaging in the US, designed to handle higher volumes and better compliance for A2P messaging while looking like a local phone number. Businesses can register their brand with 10DLC numbers to send promotional offers, reservation confirmations, customer updates, and other messages, offering flexibility, high-volume messaging capacity, improved deliverability, and a personal touch in communications. To use 10DLC, businesses must navigate registration processes, avoid common issues, and migrate from shared short codes or traditional long codes, with Vonage customers using dedicated short codes having specific migration options to SMS API or Verify API.