Hi there! 👋 I can't determine your specific username, but I can definitely help you understand where the username part is located in a SIP URI. In the SIP URI format

sip:username@sip.vapi.ai

, the username is the part that comes before the

@

symbol. According to the [Vapi documentation](https://docs.vapi.ai/advanced/sip), you are free to choose any username you like for your SIP URI. For example: - In

sip:talkaisip@sip.vapi.ai

, the username would be

talkaisip

- In

sip:1111212@sip.vapi.ai

, the username would be

1111212

The username serves as a credential used for authentication in Vapi's system, as mentioned in the [documentation](https://discord.com/channels/1211482211119796234/1211483291191083018/threads/1329143416386355270). Do you need any help with setting up your SIP URI or have any other questions about using it? Sources: - [Vapi documentation](https://docs.vapi.ai/advanced/sip) - [Discord thread about SIP username](https://discord.com/channels/1211482211119796234/1211483291191083018/threads/1329143416386355270) - [Discord thread about SIP URI examples](https://discord.com/channels/1211482211119796234/1211483291191083018/threads/1338285902144733205)

Check out the documentation link below which helps you to set up the SIP URI or SIP using VAPI. It's a good read documentation and eventually it guides you how to use VAPI API to set up SIP by yourself.