10DLC Compliance Checker

Analyze your SMS messages for US A2P 10DLC compliance before sending.

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🛡️ Rules Updates
Jan 2026

Use this free online 10DLC compliance checker to test your SMS campaigns before sending.

Our validator scans for restricted categories, SHAFT content, phishing risks and other 10DLC compliance issues that may trigger carrier filtering.

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Learn More

Stay informed with the latest SMS compliance insights, carrier policies and best-practice guides. These resources help ensure every message you send remains fully 10DLC-compliant.

SMS Compliance Checklist Step-by-step guide to reviewing your message before sending. CTIA Guidelines Explained Understand carrier expectations and acceptable message content. 10DLC Fequently Asked Questions Learn how to register your brand and campaign for A2P messaging and prevent your SMS from being marked as spam.

2026 Compliance Reference

CTIA Messaging Principles & Best Practices: 2026 SMS Compliance Guide

Are your STOP and HELP keywords active? Carriers now use automated filtering to block campaigns that fail to provide mandatory opt-out and help functionalities. Use our 10DLC Checker above to verify your brand's status.

The 2026 SMS Compliance Checklist

To maintain a high deliverability trust score, every 10DLC campaign must adhere to the following CTIA Messaging Principles:

Explicit Consent You must obtain documented "Prior Express Written Consent" before sending the first message.
Clear Identification Every message must start with your brand name.
Opt-Out Availability You must support and honor all mandatory unsubscribe keywords.
Help Accessibility Users must be able to receive support instructions via text.

Mandatory CTIA STOP & Opt-Out Keywords

Your 10DLC registry and SMS platform must recognize these five specific keywords to prevent carrier blocks: STOP, END, QUIT, CANCEL, UNSUBSCRIBE.

Compliant Opt-Out Template

[Brand Name]: You have successfully opted out. You will receive no further messages. Reply START to resubscribe.

Mandatory HELP & INFO Keywords

CTIA guidelines require a functional HELP keyword response that provides clear contact instructions.

Compliant HELP Template

[Brand Name] Support: For help, email support@yourdomain.com or call 800-XXX-XXXX. Msg&Data rates may apply. Reply STOP to unsubscribe.

Why CTIA Compliance Matters for 10DLC

The CTIA Messaging Principles serve as the framework for how Tier 1 carriers — Verizon, AT&T, and T-Mobile — filter traffic. If your campaign generates a high volume of opt-out attempts without a proper automated response, your 10DLC Brand trust score will drop. The consequences include increased per-message surcharges, reduced message throughput, and total campaign suspension without warning.

Is Your Campaign Compliant?

Don't wait for your messages to start failing. Our tool audits your 10DLC registration against current CTIA best practices to ensure your keywords and privacy policies meet carrier standards.

Run Free 10DLC Compliance Audit