10DLC campaign registration, explained simply.
What 10DLC is, why carriers require it, and what actually happens when TextBox registers your number.
10DLC (10-Digit Long Code) is the registration system US wireless carriers built for application-to-person (A2P) texting sent from a standard 10-digit local number — the kind of number most businesses already use. It was introduced to cut down on spam and fraud sent from unregistered numbers, and today nearly all US carriers require it before they'll reliably deliver business text traffic.
Registration happens in two parts: a brand registration, which verifies your business identity (legal name, address, EIN, and similar details), and a campaign registration, which describes how you'll use texting — your use case (like customer care or mixed/conversational), sample messages, and how customers opt in.
Review times vary by carrier and how complete the submission is — a well-prepared registration with accurate business details and clear sample messages moves through faster than one that needs corrections. The most common causes of delay or rejection are a business name or address that doesn't match public records, vague or missing sample messages, and opt-in language that isn't included.
TextBox handles both the brand and campaign registration for every customer as part of the plan, using the details you provide during setup — you don't have to submit anything to a carrier yourself.
Not sure where your number stands?
We handle 10DLC, toll-free verification, and opt-out compliance for every TextBox number.