This paper develops a Distributed Platform for Sharing IP Flows (DipSIF) based on NetFlow records between multiple institutions. It is assumed that NetFlow traces collected by each participant are archived on separate storage hosts within their premises and then made available to others using a server that acts as a gateway to the storage. Due to secrecy issues the platform presented here uses a prefix-preserving, cryptography-based, and consistent anonymization algorithm in order to comply to different regulations determining the exchange of traffic traces data.