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UNITED STATES (US)

Locale Summary

Locale nameUnited States
ISO codeUS
RegionNorth America
Mobile country code310, 311,
Dialing code+1

Guidelines

Two-way SMS supported Yes
Message length1600 characters.
Twilio MMS supportSupported
Sending SMS to landline numbersTwilio will not check whether the number is a landline and will attempt to send it to our carrier for delivery. Some carriers will convert the SMS into text-to-speech messages via voice calls.
Compliance considerations

Twilio’s customers, including their end users and clients, must comply with applicable laws, regulations, Twilio's policies, including, but not limited, to the Twilio Acceptable Use Policy and the Twilio Messaging Policy,  and industry standards, including, but not limited to, telecommunications providers’ policies. 

U.S. telecommunications providers may assess fees for non-compliant A2P traffic, and Twilio will pass these fees onto you. To date, T-Mobile is the first U.S. telecommunications provider to announce non-compliance fees for violations of T-Mobile’s Code of Conduct. Twilio will update these guidelines accordingly if/when additional U.S. telecommunications providers announce non-compliance fees.

T-Mobile non-compliance fees are as follows:

  • 10DLC Long Code Messaging Program Evasion: A $1,000 pass-through fee if a program/campaign is found to be using techniques such as snowshoeing, or unauthorized number replacement/recycling.

  • Content Violation: After prior warning, a $10,000 pass-through fee may be imposed for each unique instance of content violating the T-Mobile Code of Conduct involving the same sender/content provider.  This includes SHAFT (Sex, Hate, Alcohol, Firearms, Tobacco) violations, spam, phishing, and messaging that meets the Severity 0 violation as defined in the CTIA Short Code Monitoring Handbook.

Phone Numbers & Sender ID

AlphanumericLong CodeShort CodeToll Free
Pre-registrationDynamicDomesticInternational
Operator network capabilityNot SupportedNot SupportedSupportedNot SupportedSupportedSupported
Twilio supported Not Supported Not Supported SupportedNot SupportedSupported Supported
Sender ID preservedNoNoYesNoYesYes
Provisioning time------Requires registration---6 - 10 weeksRequires Verification
UCS-2 support------------------
Use case restrictions------

Loan Advertisements - Third Party Lenders

“Get rich quick” schemes

  • Work from Home Programs
  • Secret Shopper
  • Third Party Job Alerts
  • Risk Investment Opportunities

Illegal substances

Lead Generation

Hate Speech

Dynamic Routing

Snowshoeing

Filter Evasion

Shared Phone Numbers

URL Cycling

URL Redirects

Number Cycling

Spam

Fraud or Deceptive Messaging

Inapproriate Content

Profanity

High Risk Financial

  • Payday Loans
  • Short Term-High Interest Loans
  • Third Party Mortgage Loan
  • Student Loans
  • Third Party Auto Loans

Debt Forgiveness or Debt Collection

  • Debt Consolidation
  • Debt Reduction
  • Third Party Debt Collection
  • Credit Repair

Phishing

Gambling

Vape

For additional insight into these uses cases, including limitations, and exceptions, visit:  Forbidden message categories for SMS and MMS in the US and Canada

---

Loan Advertisements - Third Party Lenders

“Get rich quick” schemes

  • Work from Home Programs
  • Secret Shopper
  • Third Party Job Alerts
  • Risk Investment Opportunities

Illegal substances

Lead Generation

Hate Speech

Dynamic Routing

Snowshoeing

Filter Evasion

Shared Short Codes

URL Cycling

URL Redirects

Number Cycling

Spam

Fraud or Deceptive Messaging

Inapproriate Content

Profanity

High Risk Financial

  • Payday Loans
  • Short Term-High Interest Loans
  • Third Party Mortgage Loan
  • Student Loans
  • Third Party Auto Loans

Debt Forgiveness or Debt Collection

  • Debt Consolidation
  • Debt Reduction
  • Third Party Debt Collection
  • Credit Repair

Phishing

Gambling

Vape

For additional insight into short code requirements see https://www.twilio.com/guidelines/us/short-code

High-Risk Financial Services

  • Payday Loans 
  • Short Term- High Interest Loans 
  • Auto Loans 
  • Mortgage Loans 
  • Student Loans 
  • Debt Collection 
  • Gambling/Sweepstakes
  • Stock Alerts
  • Cryptocurrency

Get Rich Quick Schemes

  • Deceptive Work from Home Programs
  • Risk Investment Opportunities 
  • Multi-Level Marketing 

3rd Party  

  • Debt Collection or Consolidation
  • Debt Reduction
  • Credit Repair Programs 
  • Lead Generation

Controlled Substances 

  • Tobacco 
  • Vape 
  • Federally Illegal Drugs

Pornography

Profanity

Hate Speech

Phishing

Fraud

Scams

Deceptive Marketing

Snowshoeing

Filter Evasion

For additional insight into these uses cases, including limitations, and exceptions, visit:  Forbidden message categories for SMS and MMS in the US and Canada

Best practices

Note: The euro symbol (€) is not supported; avoid using this character in message submission toward the United States.

Note: The euro symbol (€) is not supported; avoid using this character in message submission toward the United States.

Refer to our FAQ for long code best practices.

Note: The euro symbol (€) is not supported; avoid using this character in message submission toward the United States.

Note: The euro symbol (€) is not supported; avoid using this character in message submission toward the United States.

Refer to our FAQ for short code best practices.

Note: The euro symbol (€) is not supported; avoid using this character in message submission toward the United States.

Note: The euro symbol (€) is not supported; avoid using this character in message submission toward the United States.

Alphanumeric - Pre-registration
Operator network capabilityNot Supported
Twilio supported Not Supported
Sender ID preservedNo
Provisioning time---
UCS-2 support---
Use case restrictions---
Best practices

Note: The euro symbol (€) is not supported; avoid using this character in message submission toward the United States.

Alphanumeric - Dynamic
Operator network capabilityNot Supported
Twilio supported Not Supported
Sender ID preservedNo
Provisioning time---
UCS-2 support---
Use case restrictions---
Best practices

Note: The euro symbol (€) is not supported; avoid using this character in message submission toward the United States.

Long Code - Domestic
Operator network capabilitySupported
Twilio supportedSupported
Sender ID preservedYes
Provisioning timeRequires registration
UCS-2 support---
Use case restrictions

Loan Advertisements - Third Party Lenders

“Get rich quick” schemes

  • Work from Home Programs
  • Secret Shopper
  • Third Party Job Alerts
  • Risk Investment Opportunities

Illegal substances

Lead Generation

Hate Speech

Dynamic Routing

Snowshoeing

Filter Evasion

Shared Phone Numbers

URL Cycling

URL Redirects

Number Cycling

Spam

Fraud or Deceptive Messaging

Inapproriate Content

Profanity

High Risk Financial

  • Payday Loans
  • Short Term-High Interest Loans
  • Third Party Mortgage Loan
  • Student Loans
  • Third Party Auto Loans

Debt Forgiveness or Debt Collection

  • Debt Consolidation
  • Debt Reduction
  • Third Party Debt Collection
  • Credit Repair

Phishing

Gambling

Vape

For additional insight into these uses cases, including limitations, and exceptions, visit:  Forbidden message categories for SMS and MMS in the US and Canada

Best practices

Refer to our FAQ for long code best practices.

Note: The euro symbol (€) is not supported; avoid using this character in message submission toward the United States.

Long Code - International
Operator network capabilityNot Supported
Twilio supportedNot Supported
Sender ID preservedNo
Provisioning time---
UCS-2 support---
Use case restrictions---
Best practices

Note: The euro symbol (€) is not supported; avoid using this character in message submission toward the United States.

Short Code
Operator network capabilitySupported
Twilio supportedSupported
Sender ID preservedYes
Provisioning time6 - 10 weeks
UCS-2 support---
Use case restrictions

Loan Advertisements - Third Party Lenders

“Get rich quick” schemes

  • Work from Home Programs
  • Secret Shopper
  • Third Party Job Alerts
  • Risk Investment Opportunities

Illegal substances

Lead Generation

Hate Speech

Dynamic Routing

Snowshoeing

Filter Evasion

Shared Short Codes

URL Cycling

URL Redirects

Number Cycling

Spam

Fraud or Deceptive Messaging

Inapproriate Content

Profanity

High Risk Financial

  • Payday Loans
  • Short Term-High Interest Loans
  • Third Party Mortgage Loan
  • Student Loans
  • Third Party Auto Loans

Debt Forgiveness or Debt Collection

  • Debt Consolidation
  • Debt Reduction
  • Third Party Debt Collection
  • Credit Repair

Phishing

Gambling

Vape

For additional insight into short code requirements see https://www.twilio.com/guidelines/us/short-code

Best practices

Refer to our FAQ for short code best practices.

Note: The euro symbol (€) is not supported; avoid using this character in message submission toward the United States.

Toll Free - Domestic
Operator network capabilitySupported
Twilio supported Supported
Sender ID preservedYes
Provisioning timeRequires Verification
UCS-2 support---
Use case restrictions

High-Risk Financial Services

  • Payday Loans 
  • Short Term- High Interest Loans 
  • Auto Loans 
  • Mortgage Loans 
  • Student Loans 
  • Debt Collection 
  • Gambling/Sweepstakes
  • Stock Alerts
  • Cryptocurrency

Get Rich Quick Schemes

  • Deceptive Work from Home Programs
  • Risk Investment Opportunities 
  • Multi-Level Marketing 

3rd Party  

  • Debt Collection or Consolidation
  • Debt Reduction
  • Credit Repair Programs 
  • Lead Generation

Controlled Substances 

  • Tobacco 
  • Vape 
  • Federally Illegal Drugs

Pornography

Profanity

Hate Speech

Phishing

Fraud

Scams

Deceptive Marketing

Snowshoeing

Filter Evasion

For additional insight into these uses cases, including limitations, and exceptions, visit:  Forbidden message categories for SMS and MMS in the US and Canada

Best practices

Note: The euro symbol (€) is not supported; avoid using this character in message submission toward the United States.

For the benefit of all our customers, these guidelines are provided to help you comply with applicable requirements and to help ensure Twilio's platform remains compliant with global telecommunications ecosystem requirements. These guidelines represent our current understanding of common compliance requirements generally applicable to Twilio and its customers, and do not constitute legal advice. By posting these guidelines, Twilio makes no assurances regarding the legal compliance of your application built using our APIs. You are expected to understand and abide by all compliance obligations applicable to your specific application. You should check these pages regularly for updates as telecommunications ecosystem requirements continue to evolve and change, and the information below may be updated or changed without notice.