All contact IP addresses are hashed when they are saved to the xDB database. There are two settings in the
Sitecore.Analytics.config file that specify how the IP addresses are stored:
This provider is always used. It hashes IP addresses using the MD5 hash algorithm. The setting contains the
Sitecore provides a tool called Hash Stored IPs. You use this tool when upgrading from a version earlier than Sitecore 8.1, where IP addresses were not hashed.