Capacity planner : how can I import a csv file of subnets ?

I am attempting to ad into Capacirty Planner hundreds of subnets in the 159.155.21.5/24  CIDR format , the only see the option to do this in the

admin ....options....modules ...discover .....ipsubnets....add and select CIDR format

is there any better way to do this ?

thanks