Inputs
Enter an IPv4 address with CIDR prefix or subnet mask.
AdeOS interactive tools
Cisco Wildcard Mask Calculator
Convert a familiar subnet mask into the inverse wildcard format used by Cisco-style policies.
Generate a wildcard mask and explain the network range it matches.
Outputs
Subnet mask, wildcard mask, and matching network details.
Example
Build an ACL match for 10.10.0.0/16.
Important note
Results support planning and learning; verify production changes against your platform and change controls.