Master US A2P 10DLC registration: Brand verification, Campaign use-case selection, sample message formatting, and privacy policy compliance.
Application-to-Person 10-Digit Long Code (A2P 10DLC) is the mandatory regulatory system governing all commercial messaging to US mobile subscribers. Unregistered numbers face severe carrier filtering, throughput throttling to 1 TPS, and penalty surcharges. This guide walks developers through end-to-end registration.
1 Step 1: Brand Registration and EIN Vetting
Before provisioning numbers, register your legal corporate identity through The Campaign Registry (TCR). Required data includes legal business name, EIN / Tax ID, address, website, and authorized point of contact. TCR issues a Brand Trust Score from 0 to 100 determining maximum messaging throughput.
2 Step 2: Campaign Use-Case Configuration
Select an approved campaign use-case matching your product:
- 2FA / Account Notification: High trust, lowest carrier surcharges, fastest review.
- Customer Care / Support: Interactive two-way messaging.
- Marketing / Promotional: Strictest carrier review and higher carrier surcharges.
3 Step 3: Sample Messages and Opt-In Disclosures
Campaign rejections overwhelmingly stem from non-compliant sample messages. Every submitted campaign must include:
- Explicit Brand Identification: Name must match registered Brand.
- Clear Opt-Out Language: 'Reply STOP to cancel'.
- Help Information: 'Reply HELP for help'.
- Public Privacy Policy URL with clear disclosure that mobile data will not be shared with third parties for marketing.
Frequently Asked Questions • Telecom Regulations & A2P 10DLC
Standard 10DLC campaign review typically takes between 3 and 10 business days. Expedited brand vetting can take 24 to 48 hours.
Major US carriers (T-Mobile, AT&T, Verizon) block unregistered traffic with error code 30034 / 30007 and levy per-message penalty fees up to $0.01 per segment.