What is A2P 10DLC?

A2P stands for application-to-person, meaning texts sent by software rather than typed by a person on a phone. 10DLC means 10-digit long code, a normal local phone number. Together they describe most business texting, such as appointment reminders, missed-call text-back and follow-up messages.

US carriers require businesses to register their brand and each messaging use case before sending this kind of traffic. Registration typically includes your legal business name, tax ID, website, a description of how customers opt in and sample messages. Unregistered messages are more likely to be filtered or blocked.

Most texting and CRM platforms guide you through 10DLC registration. A clear privacy policy on your website and honest opt-in language make approval smoother.