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United States - Messaging Regulations

Last Updated: May 19, 2019 04:36AM 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 SenderID Types:

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

Short Codes:

Example                                                       123456
Lead Time 8-12 weeks
One Time Passwords (OTP) YES
Alerts, Reminders, Notifications (ARN)*       YES
Marketing (MKT)* YES
Inbound SMS (2-way)* YES
Throughput Limit up to 30 mps
Canadian Reach No must buy CA short code
Regulatory Compliance CTIA and TCPA



* Only for Dedicated Short Codes

Long Codes:
Example                                                       15107654321
Lead Time 1 week
One Time Passwords (OTP) YES
Alerts, Reminders, Notifications (ARN) YES
Marketing (MKT) NO
Inbound SMS (2-way) YES
Throughput Limit  1 sms/sec/number
Canadian Reach YES
Regulatory Compliance Carrier filtering 


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. Marketing content sent via long code will be shut down immediately due to Carrier filtering.

Content such as SHAFT (sex, hate, alcohol, firearms, tobacco), fraud, spam, phishing, and deceptive marketing are prohibited on both short code and long code. 

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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