The ENUM specification was developed and managed by the IETF in the ENUM Working Group, which had been established for this purpose:
RFC 6116 describes the basic technology of mapping telephone numbers (E.164) to the Domain Name System.
RFC 6117 defines the requirements for the specification of new ENUM services.
RFC 6118 revises all ENUM services defined under former RFCs.
For a comprehensive overview of all RFCs, please refer to the RFC Archives of IETF or to the RFC Editor website.