If you are an Advanced or a Premium plan user then you can purchase Caller-id number as a part of the following payment option:

1) Buy New Plan
2) Renew Plan
3) Buy or Renew Add-ons

If you select any of the above plans then you will be asked if you wish to add caller-id number. As a part of our self-serv flow you can select the caller-id number as per your choice.