Help center

Messaging Services

Help articles for SMS, MMS, and other messaging services.

10DLC (10-digit Long Code) Information

• 10DLC Campaign Review: What Reviewers Check (and How to Pass the First Time)
• 10DLC Vetting Best Practices (Opt-In/Out/Help & Privacy Policy)
• How do I fully disconnect a 10DLC phone number?
• Message throughput (MPS) and Trust Scores for A2P 10DLC in the US
• What are fines that may be assessed for 10DLC violations?
• What are per-message carrier surcharges?
• What are the current 10DLC registration, brand, and campaign fees?
• What fees are associated with 10DLC Campaigns?
• What is A2P 10DLC?

Registration

• Consent & Opt-In: The Rules, and Ready-to-Use Language
• Registration form for US SMS/MMS 10DLC, Toll Free Verified Sender or Short Code Program.
• Short Code Programs: Process, Timeline, and Costs

TCR Special Use-cases and categories

• Government Entity SMS Messaging (10DLC)
• Platform Free Trial (PFT) SMS Messaging (10DLC)
• Political SMS Messaging (10DLC)
• Sole Proprietor SMS Messaging (10DLC)

FAQ

• Pros and Cons of 10DLC Messaging, Toll-Free Messaging, and Short Code Messaging
• SMS Length Limits and Message Splitting by Encoding
• T-Mobile Non-Compliance Fees "Sev-0's"
• What is considered Prohibited Content?

Troubleshooting

• Common DLR Error Codes
• I am unable to provision my Bandwidth, Telnyx, or ISP Tel numbers for messaging!

Toll-Free Verified Sender Information

• New Toll-Free SMS/MMS Verified Sender Requirements
• Toll-Free Message Verification for US & Canada
• Toll-Free SMS and MMS best practices and information for using in the US and Canada
• Toll-Free Verification Policy & Enforcement Timeline
• Toll-Free Verification: Opt-In Requirements & Common Rejection Reasons
• Toll-Free Verification: Required Information

Carrier Codes of Conduct

• AT&T Code of Conduct
• CTIA Best Practices and Guidelines
• CTIA Short Code Handbook
• T-Mobile Code of Conduct
• US Business Messaging Rules: Where They Come From