You can view the dynamic port range by using the following netsh commands:
 

  • netsh int ipv4 show dynamicport tcp
  • netsh int ipv4 show dynamicport udp
  • netsh int ipv6 show dynamicport tcp
  • netsh int ipv6 show dynamicport udp

This command sets the dynamic port range for TCP. The start port is number, and the total number of ports is range. The following are sample commands:
 

  • netsh int ipv4 set dynamicport tcp start=10000 num=1000
  • netsh int ipv4 set dynamicport udp start=10000 num=1000
  • netsh int ipv6 set dynamicport tcp start=10000 num=1000
  • netsh int ipv6 set dynamicport udp start=10000 num=1000

Ref: https://support.microsoft.com/en-us/help/929851/the-default-dynamic-port-range-for-tcp-ip-has-changed-in-windows-vista