# Call transfer not selecting a phone number in dynamic transfer

**URL:** <https://community.retellai.com/t/call-transfer-not-selecting-a-phone-number-in-dynamic-transfer/2440>\
**Category:** Support Help\
**Tags:** bug\
**Created:** [April 22, 2026, 7:35pm UTC](https://community.retellai.com/t/call-transfer-not-selecting-a-phone-number-in-dynamic-transfer/2440 "2026-04-22T19:35:35Z")\
**Posts on this page:** 5\
**Page:** 1

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**Author:** ![hello6](https://yyz2.discourse-cdn.com/flex008/user_avatar/community.retellai.com/hello6/32/690_2.png) [@hello6](https://community.retellai.com/u/hello6)\
**Post date:** [April 22, 2026, 7:35pm UTC](https://community.retellai.com/t/call-transfer-not-selecting-a-phone-number-in-dynamic-transfer/2440/1 "2026-04-22T19:35:35Z")

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I have a transfer node that is a warm transfer using a dynamic routing feature. It has been working perfectly for a couple months and all of a sudden is now not selecting one of the numbers when transfering it shows a blank number which returns the error “Number is not in e.164 format”. Please look into this ASAP as no call transfers are working.

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**Author:** ![mark1](https://yyz2.discourse-cdn.com/flex008/user_avatar/community.retellai.com/mark1/32/2524_2.png) [@mark1](https://community.retellai.com/u/mark1)\
**Post date:** [April 22, 2026, 7:38pm UTC](https://community.retellai.com/t/call-transfer-not-selecting-a-phone-number-in-dynamic-transfer/2440/2 "2026-04-22T19:38:12Z")

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Hey @hello6

Could you please share Call IDs? where you faced this issue this information will help us investigate it more effectively.

Thank You

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**Author:** ![hello6](https://yyz2.discourse-cdn.com/flex008/user_avatar/community.retellai.com/hello6/32/690_2.png) [@hello6](https://community.retellai.com/u/hello6)\
**Post date:** [April 22, 2026, 7:49pm UTC](https://community.retellai.com/t/call-transfer-not-selecting-a-phone-number-in-dynamic-transfer/2440/3 "2026-04-22T19:49:12Z")

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call\_5775c90fbd5934e6c5c4b513572

I updated the dynamic routing prompt to say to always output a number so it doesnt leave it blank. Not sure if that will help or not

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**Author:** ![mark1](https://yyz2.discourse-cdn.com/flex008/user_avatar/community.retellai.com/mark1/32/2524_2.png) [@mark1](https://community.retellai.com/u/mark1)\
**Post date:** [April 22, 2026, 7:49pm UTC](https://community.retellai.com/t/call-transfer-not-selecting-a-phone-number-in-dynamic-transfer/2440/4 "2026-04-22T19:49:58Z")

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Hey @hello6

I’ve escalated this to our team for further review.

We’ll update you as soon as we hear back.

Best regards

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<div class="post-metadata">

**Author:** ![mark1](https://yyz2.discourse-cdn.com/flex008/user_avatar/community.retellai.com/mark1/32/2524_2.png) [@mark1](https://community.retellai.com/u/mark1)\
**Post date:** [April 23, 2026, 1:09pm UTC](https://community.retellai.com/t/call-transfer-not-selecting-a-phone-number-in-dynamic-transfer/2440/5 "2026-04-23T13:09:55Z")

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Hey @hello6

Recommended fix — switch to predefined transfer node

Additional improvements:

1. Convert all phone numbers to E.164 format

2. Fix Jeremy’s entry which has a stray space

Thank You