What Is A2P 10DLC, and Does My Business Need It?

A2P 10DLC stands for Application-to-Person 10-Digit Long Code, a system mandated by major U.S. mobile carriers to regulate commercial text messages sent from software applications using standard local phone numbers. Yes, if your business uses any software to send automated text messages—including sending Google review requests through SoTrustworthy—you are required to register your business under A2P 10DLC rules. Without registration, mobile carriers like AT&T, T-Mobile, and Verizon will block your texts or flag them as spam before they reach your customers.

Breaking Down A2P 10DLC in Plain English

To understand A2P 10DLC, it helps to break the acronym into two clear parts:

• A2P (Application-to-Person): This refers to any text message sent from a web platform, software, or automated system to a mobile phone. When an HVAC technician texts a homeowner from their personal cell phone, that is Person-to-Person (P2P). When SoTrustworthy automatically texts a customer after a job is marked complete in Jobber, that is Application-to-Person (A2P).
• 10DLC (10-Digit Long Code): This is simply a standard, 10-digit local phone number with a local area code (for example, 555-123-4567).

Historically, businesses had to use expensive 5-digit short codes (like 88888) or toll-free numbers (like 800-555-0199) to send automated texts. 10DLC allows local service businesses to send automated texts from an authentic local area code. Local phone numbers feel familiar and trustworthy, which leads to significantly higher open rates and higher review conversion for home-service providers.

Why Mobile Carriers Created A2P 10DLC

In recent years, text messaging became flooded with illegal spam, phishing schemes, and unauthorized marketing. Because anyone could rent a local phone number through cloud software and send thousands of untraceable texts, mobile carriers cracked down to protect consumers.

Under regulations enforced by the FCC TCPA guidelines and mobile industry clearinghouses like The Campaign Registry, major wireless carriers instituted A2P 10DLC registration.

Carriers now require every business sending texts through software to verify three things:

1. Who you are: Your official legal business entity name and Tax ID (EIN).
2. What you are sending: Examples of the text messages you plan to send (such as review requests or service follow-ups).
3. How you get permission: Proof that your customers agree to receive text messages from your business.

Once carriers vet and approve your registration, your local phone number is placed on a trusted sender registry. This guarantees high message delivery rates and protects your business from being mistaken for a spammer.

Does My Local Business Need to Register?

If you run a local service business—whether you operate a plumbing company, roofing business, dental clinic, auto repair shop, or salon—and you send automated text messages to customers, yes, you must register.

You need A2P 10DLC registration if you do any of the following:

• Send automated Google review requests via SMS.
• Send automated appointment reminders or dispatch confirmations.
• Connect CRM or field service management software (like Jobber or HubSpot) to send customer texts.
• Send two-way text messages to customers through a web dashboard or business application.

Even if you only send five or ten text messages a day to recent customers, carriers evaluate how the text is sent. Because the message originates from a software platform rather than a handheld mobile phone, carriers classify it as A2P traffic.

What Happens If You Do Not Register?

Attempting to bypass A2P 10DLC registration leads to immediate delivery problems for your local business:

• High Message Failure Rates: Unregistered texts are aggressively filtered by carriers. Up to 80% or more of your review requests may be quietly dropped without your knowledge.
• Flagged as Spam: If your texts do go through, carriers may append warnings like "Scam Likely" or "Spam Risk" to caller IDs and message threads.
• Carrier Surcharges and Fines: Unregistered commercial messages incur heavy carrier penalty fees and higher per-message delivery costs.
• Blocked Numbers: Persistent unregistered sending will result in mobile carriers permanently blacklisting your local business phone number.

If a customer never receives your SMS review request because a carrier blocked it, you lose out on a valuable 5-star Google review that could have driven new local jobs.

How A2P 10DLC Works with SoTrustworthy

At SoTrustworthy, we rely on an SMS-first workflow because text messages boast a 98% open rate compared to less than 20% for standard email requests. Because SMS is the single most effective way to turn happy customers into public Google reviews, maintaining excellent sender reputation with mobile carriers is vital.

SoTrustworthy builds carrier compliance directly into your account configuration:

• Guided Registration: During your 14-day trial, our team guides you through submitting your business details for fast A2P 10DLC registration.
• Plan Support: A2P 10DLC registration is fully supported across all SoTrustworthy accounts, including our Starter, Growth, and Pro plans.
• Seamless Field Service Integrations: Whether you use our native dashboard or sync your customer workflow via our Jobber or HubSpot integrations, your automated review triggers route through your verified 10DLC number without disruption.
• Built-in Opt-Out Compliance: Every review request generated by SoTrustworthy includes mandatory opt-out instructions (such as "Reply STOP to unsubscribe"). Our platform automatically handles customer opt-out requests instantly to keep you compliant with carrier rules and federal privacy law.
• Smart Review-Request Throttling: Sending thousands of texts at the exact same second can trigger carrier rate limits. SoTrustworthy automatically throttles message delivery into natural, steady queues, preventing delivery spikes that trigger carrier spam filters.
• Strict Adherence to Review Rules: Carriers require transparent messaging, and Google requires unbiased feedback. SoTrustworthy never uses review gating (filtering unhappy customers away from public review pages), keeping your campaigns fully aligned with Google review policies and carrier ethics guidelines.

What Information Do You Need to Register?

Registering for A2P 10DLC takes only a few minutes when you have your business details ready. To ensure rapid vetting approval, the information you submit must match official government records exactly.

You will need to provide:

1. Legal Business Name: The exact name registered with the IRS or your state charter (for example, "Smith Plumbing & Heating LLC", not just "Smith Plumbing").
2. Employer Identification Number (EIN): Your 9-digit federal tax identification number. Sole proprietors without an EIN can register using their Social Security Number under specific sole-proprietor registration paths.
3. Physical Business Address: Your registered legal business address. P.O. Boxes and temporary addresses will cause carrier registration rejections.
4. Business Type: Sole Proprietorship, LLC, Partnership, or Corporation.
5. Contact Information: Name, title, work email, and phone number of a business representative.
6. Sample Message Templates: Examples of the text messages you plan to send (e.g., "Hi [First Name], thanks for choosing [Business Name] today! Would you mind leaving us a quick review on Google? [Link] Reply STOP to opt out.").

How Long Does Registration Take and What Does It Cost?

Once submitted, registration details are passed to independent vetting databases managed by mobile carriers.

• Timeline: Carrier vetting typically takes between 1 and 5 business days. Once approved, your SoTrustworthy account receives a green light, and high-deliverability SMS review requests begin sending immediately.
• Costs: Carriers charge standard one-time brand registration fees (typically $4 to $15) and small monthly recurring campaign fees ($2 to $10/month depending on text volume). SoTrustworthy simplifies this by managing carrier submissions directly within your plan setup.

Next Steps

• Gather your official W-9 or IRS CP575 letter to verify your exact legal business name and EIN before filling out registration forms.
• Log in to your SoTrustworthy account dashboard during your 14-day trial and navigate to the SMS Settings tab to complete your brand verification.
• Review your integration settings in Jobber or HubSpot to ensure customer phone numbers are properly formatted with standard country and area codes for instant delivery once registered.