Distributed Universal Number Discovery (DUNDi) is a P2P protocol for providing services equivalent to those provided by ENUM. DUNDi has an advantage above ENUM in that is far more resilient, as it lacks a central point of failure. It is also easy to deploy in that, there will likely not be a lot of political problem due to its lack of need for central control. Though DUNDi can be used to augment DNS, it is currently being developed with VOIP being the most immediate beneficially. This will allow, for example a number like 732 432 5432 to be mapped on either an IPv4 or IPv6 address. VOIP providers will benefit in that, they will eliminate the need to use PSTN circuit to carry traffic between two VOIP customers. For example, a customer using Vonage would call a customer using Free World Dialup without ever needing a VOIP to PSTN gate way.

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