IPv4 Covering Subnet/Wildcard Mask Calculator

This calculator is for OFFLINE use, ready to run inside Microsoft Excel (or LibreOffice Calc, Google Spreadsheet).

【Notes for Cisco IOS Wildcard Mask】
You can simply assume Cisco IOS Wildcard Mask are derived by mapping 1s to 0s and 0s to 1s of equivalent subnet mask in binary notation.

【Downloading this tool】
More details about downloading this Excel file can be found in this post:

https://showipprotocols.blogspot.com/2019/11/revised-covering-subnet-calculator.html

source

ipv4