The Finnish Regulatory Communications Authority Ficora launched .8.5.3.e164.arpa user ENUM into public commercial operation after a successful pilot phase that started in 2003. The database was cleared between the pilot phase and commercial operation and thus there are no delegations at the moment. A Ficora representative says: "Our next aim is to get as much support from telcos and registrars for ENUM as possible. Currently I'm optimistic for their support since we are having good discussions with all major Finnish telcos."
User ENUM is currently in commercial operation in Austria, Poland, Romania, Germany, Netherlands, and Finland. Ireland is still in negotiations.
This article was accessed through Richard's Blog on VOIP and ENUM.
What is ENUM?
ENUM is a protocol that is the result of work of the Internet Engineering Task Force's (IETF's) Telephone Number Mapping Working Group. The charter of this working group was to define a Domain Name System (DNS)-based architecture and protocols for mapping a telephone number to a Uniform Resource Identifier (URI) which can be used to contact a resource associated with that number. The protocol itself is defined in RFC 3761: The E.164 to URI DDDS Application (ENUM), which obsoletes RFC 2916. The protocol provides facilities to resolve E.164 telephone numbers into other resources or services on the internet. ITU-T Recommendation E.164 is the international public telecommunication telephone numbering plan and current ENUM delegations can be found here. More information on ENUM can be found here.