A2P 10DLC Registration

A2P 10DLC stands for application-to-person messaging using a U.S. ten-digit long-code number. U.S. mobile carriers use registration frameworks to identify the business or sender and the type of SMS or MMS campaign. Providers such as Twilio describe separate brand and campaign registration steps, including details about message purpose and how recipients opt in, opt out, and request help.

Registration is a carrier and messaging-provider compliance process; it should not be described as a universal federal business license. Toll-free numbers and short codes use different messaging frameworks. Approval, throughput, fees, and applicable rules depend on the provider, sender type, campaign, and carrier.

Importantly, being registered does not create consumer consent. Businesses still need to evaluate applicable consent and messaging laws and honor opt-outs. A contractor sending automated appointment messages should document why recipients receive those messages, what they agreed to, and how to stop them. Verify current provider requirements before launching a campaign.