@Manuel Saelices
I understand the inconvenience you're facing with the trial-and-error method of selecting area codes. To streamline the process, I recommend checking the availability of numbers directly within the VAPI 'Phone Numbers' dashboard. This will allow you to see which area codes have numbers available for purchase without having to guess.
If you're looking for a specific area code, such as 415, you can filter the available numbers by that area code in the dashboard. If you need assistance with this process or if you're encountering any issues, please let me know, and I'll be happy to help you further.