You are the IT manager for a rapidly expanding tech company that is continually adding new devices to its network. The current IPv$4$ addressing scheme is becoming a bottleneck due to the limited number of available addresses. In addressing this issue and planning for future scalability, and considering the limited availability of IPv$4$ addresses and the need for future scalability in your rapidly expanding tech company, what would be the most suitable solution to avoid address depletion and ensure continued growth?