SIP411 is dedicated to enhancing the growth of the SIP industry and user community. We believe that a comprehensive directory of SIP addresses is a prerequisite to large scale on-net calling.

Please become a recognized member of the SIP community by adding your free personal and business listing to SIP411.com -- the first comprehensive independent SIP White and Yellow page directory.

In addition to white and yellow pages, SIP411.com also offers SIP aliases (sip:<user>@sip411.com). Your alias allows you to hide your sip address from causal directory browsers and manage multiple SIP addresses.

Please join now -- it's free!