Look in the CCS Supplement, found via the help screen under Additional Documentation TOC. You also may find downloading the Network Automation admin guide (Network_Automation_Admin_Guide_68.pdf) from the support site to be helpful as well. -Lon.
We have only 357 ranges set, and 272 of them are /16, a single /17, and the rest are /24's, /22, etc. So, with the logs only showing it getting through about 4 subnets each day is definitely a problem. Do you agree? -Lon.