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United States - Messaging Regulations

Last Updated: Apr 18, 2019 09:07PM UTC

General Information:

  • Handset delivery receipts supported
  • Encoding supported: GSM, UCS-2, and Latin-1
  • Concatenated (long) messages supported
  • Short Codes (Dedicated) supported
  • Message Length – 160 characters (GSM or Latin 1), 70 characters (USC-2)

Supported Traffic Types:

One Time Passwords (OTP) YES
Alerts, Reminders, Notifications (ARN)* YES
Marketing (MKT)* YES
Inbound SMS (2-way)* YES


*Note: Dedicated Short Codes required for these traffic types

Supported SenderID Types:


Alphanumeric NO
Short Code YES
Local Long Code YES
International Long Code NO


Content Restrictions:

High-Risk Financial Offers are banned on Shared Short Codes

  • Loan origination and matching
    • Payday loans
    • Short-term loans
    • Auto loans
    • Mortgage loans
    • Student loans
  • Debt consolidation and reduction
  • Investment opportunities
  • Credit repair programs
  • Tax relief programs
    • Work from home programs
Marketing traffic and high volume use cases should be sent via short code to ensure optimal delivery.

Maximum Message Length:

Encoding Used Single Message Long Message
GSM, Latin 1, and UCS-2 160 bytes 1,400 bytes


Dedicated Short Codes: Stop Feature Guide 

Download the attachment for TeleSign's STOP Feature Guide. Processing STOP is required for Recurring alerts use cases on Dedicated Phone Numbers.

SMS Compliance Best Practices: United States and Canada

Download the attachment for TeleSign's SMS Compliance Best Practices.
The TeleSign SMS Best Practices provide a high-level overview of industry guidelines in the U.S. and Canada, in addition to summarizing TeleSign’s SMS use case policy and requirements.

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