# I have a retell account and a twilio acccount, how to integrate twilio to retell?

**URL:** <https://community.retellai.com/t/i-have-a-retell-account-and-a-twilio-acccount-how-to-integrate-twilio-to-retell/3322>\
**Category:** Support Help\
**Tags:** telephony\
**Created:** [July 11, 2026, 11:28am UTC](https://community.retellai.com/t/i-have-a-retell-account-and-a-twilio-acccount-how-to-integrate-twilio-to-retell/3322 "2026-07-11T11:28:10Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![vishnu](https://yyz2.discourse-cdn.com/flex008/user_avatar/community.retellai.com/vishnu/32/2127_2.png) [@vishnu](https://community.retellai.com/u/vishnu)\
**Post date:** [July 11, 2026, 11:28am UTC](https://community.retellai.com/t/i-have-a-retell-account-and-a-twilio-acccount-how-to-integrate-twilio-to-retell/3322/1 "2026-07-11T11:28:10Z")

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I have just created the retell account and i need to patch in telephony to retell.

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**Author:** ![Shah-Fazal](https://yyz2.discourse-cdn.com/flex008/user_avatar/community.retellai.com/shah-fazal/32/2522_2.png) [@Shah-Fazal](https://community.retellai.com/u/Shah-Fazal)\
**Post date:** [July 11, 2026, 12:47pm UTC](https://community.retellai.com/t/i-have-a-retell-account-and-a-twilio-acccount-how-to-integrate-twilio-to-retell/3322/2 "2026-07-11T12:47:36Z")

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Hey @vishnu Here’s how to connect your Twilio number to Retell via Elastic SIP Trunking:

Step 1: Create an Elastic SIP Trunk in Twilio

- Set up Termination (outbound): Note the Termination SIP URI. Whitelist Retell’s IP block `18.98.16.120/30` or set up username/password auth.
- Set up Origination (inbound): Use `sip:sip.retellai.com` as the origination SIP URI.

Step 2: Move your number to the SIP Trunk

- In Twilio, assign your existing number to the elastic SIP trunk.

Step 3: Import the number into Retell

- In the Retell dashboard, import the number and supply the Termination SIP URI (and credentials if using auth).

Once imported, the number works just like a Retell-purchased number for inbound/outbound calls.

See the full guide here: [Twilio Integration](https://docs.retellai.com/deploy/twilio)

Or you can see this tutorial : [https://youtu.be/JC3PV\_R-Z1Y?si=b48K11FeVT48rRwn](https://youtu.be/JC3PV_R-Z1Y?si=b48K11FeVT48rRwn)

Thank You

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**Author:** ![krittiya.clark](https://yyz2.discourse-cdn.com/flex008/user_avatar/community.retellai.com/krittiya.clark/32/2065_2.png) [@krittiya.clark](https://community.retellai.com/u/krittiya.clark)\
**Post date:** [July 13, 2026, 1:54am UTC](https://community.retellai.com/t/i-have-a-retell-account-and-a-twilio-acccount-how-to-integrate-twilio-to-retell/3322/3 "2026-07-13T01:54:49Z")

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This video is very helpful and easy to follow.

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**Author:** ![sales1](https://yyz2.discourse-cdn.com/flex008/user_avatar/community.retellai.com/sales1/32/2756_2.png) [@sales1](https://community.retellai.com/u/sales1)\
**Post date:** [September 21, 2026, 4:56am UTC](https://community.retellai.com/t/i-have-a-retell-account-and-a-twilio-acccount-how-to-integrate-twilio-to-retell/3322/4 "2026-09-21T04:56:39Z")

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I like the retell interface and the way agents can be built. It is very intuitive. But I am unable to easily connect a SIP phone to the system. My existing SIP provider requires the system to authenticate, but despite putting the details in on ReTell, it doesn’t work because Retell doesn’t actually authenticate and connect to the SIP. The suggested alternative was to get a Twilio number - which was also fairly time consuming, and not the easiest system to navigate. However, now having got a number on Twilio, it is mind bogglingly complicated to connect it. Who and how can I feedback that this step needs to be made much simpler.