### Answer The placeholder for the caller's phone number (from phone number) in an agent prompt is

{{user_number}}

[(1) ]() . This system variable represents the user's phone number and works differently depending on call direction : - For **inbound calls**:

{{user_number}}

contains the

from_number

- For **outbound calls**:

{{user_number}}

contains the

to_number

You can use it directly in your prompts like this:

"Hello, I see you're calling from {{user_number}}"

. If you need the agent's phone number instead, use

{{agent_number}}

, which contains the

to_number

for inbound calls and

from_number

for outbound calls .

​ To learn more, see the sources I considered: [[1] Dynamic Variables](https://docs.retellai.com/build/dynamic-variables) ​

Feel free to tag @AI Evy with additional questions. I also appreciate feedback, it helps me improve.