If your GHL account sends text messages — lead follow-up, appointment reminders, review requests, any automated SMS — and you have not completed A2P 10DLC registration, a significant portion of those texts are being filtered by carriers before they reach your contacts. The workflow fires, GHL logs it as sent, and nothing arrives on the other end.
This is one of the most common and most consequential gaps in GHL accounts managed by agencies. Here is what A2P 10DLC is, why it matters, and what to do about it.
What A2P 10DLC Actually Means
A2P stands for Application-to-Person. 10DLC refers to 10-digit long codes — the standard US phone numbers used for business text messaging. The 10DLC registration system was introduced by US mobile carriers to reduce spam and improve deliverability for legitimate business messaging.
In practical terms: if you want to send text messages from a business phone number to US recipients at scale — which is exactly what GHL automations do — you are required to register your brand and your messaging campaigns with The Campaign Registry (TCR). This registration tells carriers that your messages are legitimate, which dramatically improves the odds that they actually get delivered.
Unregistered numbers sending automated SMS are treated as potential spam by carriers and filtered accordingly. The filtering is not consistent — some messages get through, some do not — which makes it especially insidious. Your system looks like it is working because some texts arrive, but a meaningful percentage are being silently blocked.
What Registration Involves
A2P 10DLC registration in GHL happens in two steps: brand registration and campaign registration.
Brand registration
This registers the business entity that is sending the messages. It requires basic business information: legal business name, EIN (Employer Identification Number), business type, address, and website. For agencies managing GHL on behalf of clients, the brand registration should reflect the client's business — not the agency.
Campaign registration
This registers the type of messages being sent and the use case. GHL supports several campaign types: marketing, account notifications, customer care, and others. Each campaign is reviewed and approved before messages can be sent at registered volumes. The campaign registration requires sample messages — actual examples of what will be sent — and confirmation that opt-in consent is being obtained from recipients.
Registration is not instant. The process typically takes one to three weeks from submission to approval, which means it needs to happen at the start of an account setup — not as an afterthought after the workflows are already built and supposedly running.
What Happens If You Skip It
The consequences range from reduced deliverability to complete blocking depending on the carrier and the volume of messages being sent. At low volumes some unregistered messages get through. At higher volumes carriers are more aggressive. Either way you are leaving deliverability to chance on a system that is supposed to be reliable.
There are also financial consequences. Carriers can issue fines for unregistered high-volume messaging, and GHL itself has policies around A2P compliance that affect account standing. For agencies delivering SMS-dependent services to clients under their own brand, a deliverability failure is a client service failure — and one that is difficult to explain.
How It Works for Agencies With Multiple Subaccounts
If you manage GHL subaccounts for multiple clients, each subaccount that sends SMS needs its own A2P registration. Brand registration is tied to the business entity — each client is a separate brand. Campaign registration is tied to the messaging use case within that subaccount.
This means A2P registration is not a one-time task. It is a per-client requirement that needs to happen during onboarding for every client whose subaccount will send text messages. Building it into your standard onboarding checklist — and initiating it on day one rather than at the end of setup — is the most practical approach.
What Good Looks Like
A properly registered GHL account has approved brand and campaign registrations, phone numbers linked to those campaigns, and messaging that stays within the approved use case and volume. Messages go out and they arrive. Deliverability is consistent. The client's contacts are actually receiving the automations that were built for them.
It is not glamorous. It does not show up in a demo. But it is the difference between a GHL system that works and one that looks like it works while silently failing at the moment of truth — when a real lead sends a text back into the void.
Getting It Done
If you are not sure whether your GHL accounts are properly registered, the place to check is the Phone Numbers section under Settings in each subaccount. Registration status is visible there. If you see unregistered numbers attached to subaccounts that are sending automated SMS, that is the first thing to fix — before anything else in the account.
A2P registration is one of the first things I handle when setting up or auditing a GHL account for an agency. It is too foundational to leave for later.