What Is A2P 10DLC? The Plain-English Guide for GHL Users

A2P 10DLC stands for "Application-to-Person 10-Digit Long Code." In plain English, it is the mandatory registration system created by US telecom carriers (like AT&T, T-Mobile, and Verizon) to regulate business text messaging.

Why Does A2P 10DLC Exist?

For years, businesses used standard local phone numbers to send mass marketing texts. This led to a massive increase in spam and phishing. To combat this, carriers introduced A2P 10DLC. It forces businesses to register who they are (Brand Registration) and what they are sending (Campaign Registration) before they can send a single message.

Without this system, carriers could not easily distinguish between a legitimate local plumber sending an appointment reminder and a scammer sending thousands of phishing links.

How It Affects GoHighLevel Users

If you use GoHighLevel (which routes SMS through Twilio or LeadConnector), A2P registration is not optional. As of recently, unregistered traffic is subject to heavy filtering, complete blocking, and higher per-message fees. If your texts are saying "Sent" in GHL but your customers aren't receiving them, lack of A2P approval is almost certainly the reason.

Status	Deliverability	Carrier Fees
Unregistered	Blocked or Heavily Filtered	High Penalties
Pending	Limited Throughput	Standard
Approved	Maximum Reliability	Lowest Rates

The Two Parts of Registration

• Brand Registration: Verifying your legal business identity. You must provide your exact Legal Business Name and EIN.
• Campaign Registration: Declaring your use case. Are you sending appointment reminders? Marketing promotions? Customer care updates? You must declare this and provide sample messages.

Getting approved can be a headache, but it's the only way to ensure your SMS deliverability remains high. Don't let your GoHighLevel account suffer from blocked messages.