A2P 10DLC compliance, in plain English

If your business texts customers from a local US phone number, the carriers (AT&T, T-Mobile, Verizon) require you to register first. That registration system is called A2P 10DLC — "application-to-person, 10-digit long code." Strip the jargon and it means: tell the carriers who you are and what you'll send, and they'll let your messages through.

Skip it, and your texts get filtered, delayed, or silently dropped — and you may still be charged for them.

Why carriers require registration

A few years ago, spammers flooded local numbers with scam texts. Carriers responded by requiring every business to register its identity and its messaging purpose. Registered traffic gets reliable delivery and higher sending limits; unregistered traffic gets throttled or blocked.

This is actually good news for legitimate businesses: registration is cheap, and it moves your messages into the trusted lane.

The two-step registration

Step 1 — Brand registration. You register your business: legal name, EIN (tax ID), address, website. This tells carriers who is sending. One-time process per business.

Step 2 — Campaign registration. You describe what you'll send: "marketing offers and order updates to customers who opted in," for example. Each messaging use case is a "campaign" (not to be confused with an individual text blast). Campaigns are vetted, usually within a few days.

What it costs

Typical fees in 2026:

• Brand registration: $4–$44 one-time, depending on vetting level
• Campaign registration: $15 one-time vetting fee, then $1.50–$10 per month depending on use case
• The platform or provider may pass these through at cost or bundle them

That's it — for most small businesses, well under $100 to start and a few dollars a month to maintain.

What gets businesses rejected

• Vague campaign descriptions. "Sending messages to customers" fails; "order confirmations and weekly offers to opted-in customers of our bakery" passes.
• Missing opt-in evidence. You must describe how people consent (keyword, web form, point of sale) and your confirmation message must include the required wording.
• Public URL shorteners. Carriers dislike bit.ly-style links because spammers hide behind them. Use branded or platform-provided short links instead.
• Prohibited content. Cannabis, gambling, and some lending categories face extra restrictions regardless of registration.

How AutoCampaign.ai handles it

Registration status is tracked on every number in your account, and campaigns are blocked from sending on unregistered numbers before carriers penalize you — not after. Sender Pools then spread your volume across registered numbers with daily limits per number, which keeps your traffic looking the way carriers expect: steady and human-scale.

The 10-minute action plan

1. Have your EIN, legal business name, and website ready.
2. Register your brand through your texting platform.
3. Describe your messaging honestly and specifically in the campaign registration.
4. Make sure your opt-in confirmation includes the required wording (our Text-to-Join guide has the checklist).
5. Wait for approval — usually days, not weeks — then send with confidence.

Registration isn't a hurdle; it's the price of the trusted lane. Pay it once and your deliverability problems mostly disappear.