post https://api.twilio.com/2010-04-01/Accounts//IncomingPhoneNumbers.json
If you'd like to test API requests to the phone numbers resource without provisioning a number for your account, you can use your test credentials.
You can use the magic numbers provided in the Test credentials in the exercise.
π‘Tip: You can either provide the PhoneNumber to purchase or the AreaCode of a location and Twilio will provision you a number in that location.