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The VoiceInfra Twilio integration lets you route calls on your existing Twilio phone numbers to AI agents — without porting a single number away from Twilio. Your numbers stay in your Twilio account, Twilio continues to handle the telephony infrastructure, and VoiceInfra adds the AI conversation layer on top. Your customers keep calling the same numbers they always have.
Your numbers remain in your Twilio account throughout. Twilio continues to handle telephony and billing. VoiceInfra does not move, port, or take ownership of your numbers.

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Prerequisites

Before connecting, locate the following credentials in your Twilio Console:
  • Account SID — starts with AC, exactly 34 characters
  • Auth Token — 32-character token shown on your Twilio Console dashboard
Account SID: ACxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx  (34 chars, starts with AC)
Auth Token:  xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx    (32 chars)
Keep your Auth Token private. VoiceInfra encrypts it at rest and uses it only to fetch your number list via the Twilio API.

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Import Your Twilio Numbers

1

Open the Twilio import screen

In the VoiceInfra dashboard, go to Settings → Phone Numbers → Connect Twilio.
2

Enter your Twilio Account SID and Auth Token

Paste your Account SID and Auth Token into the form. VoiceInfra encrypts these credentials immediately. They are never stored in plain text, exposed in logs, or used to access your Twilio billing or account settings.
3

Browse your available numbers

After connecting, your Twilio numbers appear in a list showing the country code, full number, and friendly name. Review the list to confirm your numbers are present.
4

Select and import

Check the numbers you want to bring into VoiceInfra — one, several, or all of them. Click Import. Selected numbers are instantly available in your VoiceInfra dashboard.
5

Assign to an AI agent

For each imported number, choose the AI agent that handles calls on that number. You can assign different agents to different numbers and configure separate agents for inbound versus outbound calls.

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Re-Importing Numbers

If you add new numbers to your Twilio account after the initial import, return to Settings → Phone Numbers → Connect Twilio and run the import again. VoiceInfra re-fetches your current Twilio number list and makes any new numbers available for selection.

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Removing an Imported Number

You can unlink any imported number from VoiceInfra at any time through the phone numbers settings page. Removing a number from VoiceInfra does not affect the number in your Twilio account — it continues to exist there with all its existing configuration.

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Frequently Asked Questions

No. You continue to pay Twilio’s standard rates for number rental and call usage. VoiceInfra charges separately for AI usage. There are no additional telephony fees from VoiceInfra.
Yes. VoiceInfra can act as a component inside your Twilio Studio flows. AI agents handle conversations and can return results that continue your Studio flow logic.
Yes. VoiceInfra integrates with Twilio Flex. Human agents working in the Flex agent desktop see the AI conversation context when a call is transferred, so they can pick up without asking the customer to repeat themselves.
Removing your credentials unlinks all imported numbers from VoiceInfra. Your Twilio account and numbers are completely unaffected — they continue working as normal in Twilio.
Yes. Repeat the connection process with a different Account SID and Auth Token to import numbers from an additional Twilio account.
Yes. Any Twilio number — US, UK, AU, EU, or any other country — appears in the import list with its country code (e.g., +1, +44, +61) and full number.