ToughNumbers has been built by several people that have been in the telecom industry for 20 years. We started building VoIP services and realized a need to bridge the gap between small local CLECs and VoIP system builders. Time and time again we run into the issue of trying to set up a new customer, only to find that they are in a small town where porting to a regular VoIP provider is not possible. Hours of Operation: 8 am to 5 pm. Payment Methods: Credit Card. Service Offered: Number Portability