ITU-T Recommendation E.193 Series E: Overall network operation, telephone service, service operation and human factors. Operation, numbering, routing and mobile services… Numbering plan of the international telephone service. E.164 Country Code expansion

ITU-T Recommendation E.191.1 Series E: Overall network operation, telephone service, service operation and human factors. International operation… Criteria and procedures for the allocation of the ITU-T International Network Designator addresses Covering note ITU-T Recommendation E.191 (03/2000) B-ISDN addressing. Corrigendum 1 ITU-T Recommendation E.191 Series E: Overall network operation, telephone service, service operation and human factors. Operation, numbering, routing and mobile services – International operation - Tones in national signalling systems. B-ISDN addressing ITU-T Recommendation E.195 Series E: Overall network operation, telephone service, service operation and human factors. International operation - Numbering plan of the international telephone service. ITU-T International numbering resource administration CCITT Recommendation E.202 Telephone network and ISDN. Operation, numbering, routing and mobile service. Network operational principles for future public mobile systems and services ITU-T Recommendation E.210 Telephone network and ISDN. Operation, numbering, routing and mobile service. Ship station identification for VHF/UHF and maritime mobile-satellite services