Numbering Plan Interworking for the E.164 and X.121 Numbering Plans - Series E: Telephone Network and ISDN Operation, Numbering, Routing and Mobile Services - International Operation - Numbering Plan of the International Telephone Service

Numbering plan interworking for the E.164 and X.121 numbering plans

Numbering plan interworking for the E.164 and X.121 numbering plans

Numbering plan interworking for the E.164 and X.121 numbering plans

Application of E.164 Numbering Plan for UPT - Series E: Overall Network Operation, Telephone Service, Service Operation and Human Factors - International Operation - Numbering Plan of the International Telephone Service Numbering, Routing and Mobile Services - International Operation - Numbering Plan of the International Telephone Service

Application of E.164 Numbering Plan for UPT - Series E: Overall Network Operation, Telephone Service, Service Operation and Human Factors Operation, Numbering, Routing and Mobile Services - International Operation - Numbering Plan of the International Telephone Service

Use of Escape Code "O" within the E.164 Numbering Plan During the Transition Period to Implementation of NPI Mechanism - Series E: Telephone Network and ISDN Operation, Numbering, Routing and Mobile Services - International Operation - Numbering Plan of the International Telephone Service

Application of Recommendation E.164 Numbering Plan for Universal International Freephone Numbers for International Freephone Service - Series E: Overall Network Operation, Telephone Service, Service Operation and Human Factors Operation, Numbering, Routing and Mobile Services - International Operation - Numbering Plan of the International Telephone Service

E.164 Numbering Resources for Trials Series E: Overall Network Operation, Telephone Service, Service Operation and Human Factors International Operation - Numbering Plan of the International Telephone Service

E.164 Country Code Expansion Series E: Overall Network Operation, Telephone Service, Service Operation and Human Factors Operation, Numbering, Routing and Mobile Services - International Operation - Numbering Plan of the International Telephone Service