Using virtual numbers for your business purpose can help you to maintain your privacy and look more professional. "Tossable digits" is an economical service to get an international or local virtual number for your business and private use.
You can get a virtual number from the company whose calls will be transferred to your personal phone number. You can answer, forward, let the caller leave a voice message and can do everything you do with your original number.
Some of the coolest features of Tossable Digits are Toll-free numbers, local numbers, Unlimited Calls and message recording.
If you want to integrate their service with your own system, they have an API support available.