Aspects of the management and administration of the ETNS are undertaken by the following bodies:
The function of ETNS Administrator is performed by Numbering, Naming and Addressing Working Group of the Electronic Communications Committee. The ETNS Administrator is responsible for implementation of the ETNS Conventions and for the designation of European Service Identities for new ETNS services.
The function of ETNS Registrar is the responsibility of the ERO Director, and includes the assignment, withdrawal, and surveillance of ETNS Numbers. The Registrar is also responsible for the distribution of details of Routing Numbers associated with ETNS Numbers. In performing the function of ETNS Registrar, the ERO Director is ultimately responsible to the European Telecommunications Office Administrative Council.
NeuStar, Inc. manages the assignment, withdrawal, and surveillance of ETNS Numbers, registration of ETNS Service Providers and Serving Networks, distribution of Routing Numbers, and support of the number portability process on behalf of the ETNS Registrar.
The function of Advisory Body is performed by the European Numbering Forum, an independent forum for telecommunications industry associations on numbering issues. The European Numbering Forum provides advice to the European Telecommunications Office Administrative Council on issues related to management of the ETNS and the designation of European Service Identities.
In addition, an ETSI standard – EN 301 161 (“Management of the European Telephony Numbering Space”) – specifies:
- The structure of ETNS Numbers
- The designation of European Service Identities for a particular service
- The length of ETNS Numbers
- The evolution of numbering from national numbers to pan-European numbers to global numbers
- The management methods to be used for controlling routing of calls.