Best solution/platform for cold calling?

Hello guys! Do you know what platform i can use to make cold calls for Usa, Canada, Europe and other continents/countries clients? Cause I live in Europe myself, but for example if a client doesnt have a whatsapp number, i dont know how to call him if he is located in USA. Also would like to get USA number too, so i can look serious and professional cause most of clients come from USA. Thanks!