Derive the inverse wildcard mask from a subnet mask or CIDR prefix for Cisco ACL and OSPF.
Enter a subnet mask (255.255.255.240), CIDR (/28), or prefix (28). Wildcard = 255 minus each mask octet.
Wildcard mask: 0.0.0.15
Subnet mask: 255.255.255.240 (/28)
Usable hosts: 14
Raw block size: 16 addresses
Wildcard Mask Calculator helps you derive the inverse wildcard mask from a subnet mask or cidr prefix for cisco acl and ospf. It is commonly used by network admins, IT support teams, ops engineers for wildcard mask calculator, cisco wildcard mask, inverse mask.
Enter a dotted subnet mask or CIDR. Wildcard octets = 255 minus each mask octet.