Network Toolkit
Wildcard masks
Convert CIDR prefixes, subnet masks, and contiguous wildcard masks.
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Mask conversion
Input type
CIDR prefix
CIDR prefix
Subnet mask
Wildcard mask
Prefix
Wildcard bits are the inverse of subnet-mask bits. Non-contiguous ACL wildcards are valid in some devices, but cannot be converted to a CIDR prefix.
Results
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CIDR prefix
/24
Copy CIDR prefix
Subnet mask
255.255.255.0
Copy Subnet mask
Wildcard mask
0.0.0.255
Copy Wildcard mask
Binary wildcard
00000000.00000000.00000000.11111111
Copy Binary wildcard