Validating IP Address Entries in Excel | RedNectar's Blog
Geeky Excel Formulas – Subnet Math / Group By Subnet using Built-In Excel 2010 Formulas | chentiangemalc
Making an excel file to calculate network mask and wildcard mask. I'm wanting the best way to get excel to list a 1 or 0 for the base 10 IP address typed
Separate octets of IP address in Excel
FREE: SolarWinds Advanced Subnet Calculator – IP subnet calculation made easy – 4sysops
How to manage IP Addresses in Excel - ICTShore.com