Worked example
/27 equals 255.255.255.224 with wildcard 0.0.0.31 and 32 total addresses.
Subnet Mask & Wildcard Table
A complete reference for all IPv4 subnet masks and their corresponding wildcard masks. Type a prefix or mask below to find its details and binary representation.
How to use Mask Converter
Enter a prefix, subnet mask, or wildcard mask and the converter synchronizes the other representations immediately.
Common mistake
A wildcard mask is the bitwise inverse of a subnet mask, not another notation for the same decimal value.