How it works
List of IP addresses or subnets in firewalls tend to only grow with time.
This page takes list of CIDRs and removes all duplicates. Each IP address will be taken and compared one-by-one with all other addresses in the list. Duplicates will be removed.
For example, following IP address pairs are duplicates:
1. Identical IP addresses
2. One address is a subnet of another address and can be excluded
3. Networks are adjacent and can be merged into one (see "Merge adjacent CIDRs" checkbox)
Hover on IP addresses in initial list for comments.