Research for white label call forwarding company

The project entails looking for phone companies that offer white label and API integration for USA numbers. Specifically, to be used as a service for clients of my company. The call forwarding number should be for a business number under $7 USD per number per client. The following is the Basic criteria for a company to qualify for addition to the list : 1. Being White Lable 2. With API integration 3. With a price under $7 per client 4. They should offer USA state-specific business numbers Excel sheet with the following details need to be provided as the output of the project: 1. Company name 2. Website URL 3. The pricing structure is broken down into the following: § number activation fee § The pricing structure should include the number of clients. (example. 1-50 $7, 51 -100 $6, and so on. ) § call forwarding fee § other fees Additional info that could help your search. A long time ago I was able to find a call forwarding company that all other companies around the world use as a white label. Unfortunately, I lost their details.