Register your business and phone numbers with Voice Integrity

In response to a surge in unsolicited calls, analytics engines have deployed aggressive algorithms to assess incoming calls. While necessary, this filtering can result in legitimate business calls being blocked or labeled as spam, significantly reducing customer engagement. When time-sensitive notifications or critical alerts are blocked or ignored, the business impact can be severe.

Voice Integrity, part of Twilio's Voice Trust product suite, lets businesses register their details and outbound phone numbers directly with major US analytics vendors. This proactive registration helps analytics engines recognize legitimate business traffic, so calls are less likely to get flagged as spam or blocked. Voice Integrity isn't a silver bullet: it won't make your numbers fully immune to spam labels, but it's a crucial first line of defense.

You can register your Twilio phone numbers by using the Twilio Console or the Trust Hub API. Registered numbers are recognized by the analytics engines supporting the following carriers:

• T-Mobile
• Verizon
• AT&T

For step-by-step instructions on completing your registration, see Voice Integrity onboarding.

To obtain an approved Voice Integrity bundle, you must do the following:

• Have an Approved Primary or Secondary Business Profile. Your Profile must include:
  • A registration authority, either an Employer Identification Number (EIN) or a Data Universal Numbering System (DUNS) number
  • A valid US business address with the correct ISO country code
  • An authorized representative with a valid US phone number
  • A functioning secure website URL (https://)
• Assign one or more phone numbers assigned to your Business Profile. Only these assigned phone numbers can be registered for Voice Integrity.

• Shaken/Stir: Having the highest level of Shaken/Stir attestation informs the analytic engines that you are a legitimate caller.
• CNAM and Branded Calling: Display your business name, logo, and reason for calling on supported devices to improve answer rates.

This guide covers a feature that can support the following use cases:

You can use the feature in this guide to prevent your critical alerts from being flagged as spam. For example, ensure your automated weather alerts or delivery notifications reach your customers reliably without being blocked by carriers. To learn about advanced features you can use with voice notifications, see Voice notifications.

You can use the feature in this guide to safeguard your contact center's outbound dialing reputation. Registering your numbers ensures that agent outreach calls are not mislabeled as spam, preserving your operational efficiency and customer trust. To learn about advanced features you can use with outbound contact centers, see Voice outbound contact center.

You can use the feature in this guide to maximize connection rates for high-velocity sales teams. Registering your numbers helps your outreach avoid negative carrier flags so prospects feel confident answering your calls. To learn about advanced features you can use with sales dialers, see Voice sales dialer.

Explore the following guides to build on what you've learned in this guide:

• Voice Integrity onboarding: Complete registration requirements to help protect your number reputation.
• US Basic Branded Calling: Brand your outgoing calls with your business name to further improve your answer rates.
• US Enhanced Branded Calling: Display your custom company name, logo, and reasons for calling on supported devices.

Find reference documentation for the topics on this page.

• Trust Hub API