Table of Contents

1     Scope          
 2     References
 3     Definitions
 4     Abbreviations and acronyms             
 5     Considerations        
 6     IMSI structure, format and assignment procedures 
        6.1     Structure and format of the IMSI         
        6.2     IMSI assignment procedures 
Annex A – Criteria and procedures for the assignment and reclamation of shared ITU‑T E.212 mobile country codes (MCC) for networks and their respective  mobile network codes (MNCs)    
        A.1     Introduction 
        A.2     Scope              
        A.3     Principles for assignment       
        A.4     Criteria for assignment            
        A.5     Assignment  
        A.6     Voluntary return of unused MNCs      
        A.7     Criteria for reclamation           
        A.8     Reclamation 
        A.9     Reconsideration process         
Annex B – Principles for the assignment of mobile network codes (MNCs) within geographic MCCs    
Annex C – Procedures for the assignment of an additional MCC to a country    
Annex D – Use of mobile subscription identification number (MSIN)    
Annex E – The use of an MCC+MNC in a country other than the country to which  the MCC has been assigned by the Director of TSB    
        E.1     Introduction 
        E.2     Procedure to be followed for implementation of the extra-territorial use of an MCC+MNC    
        E.3     Voluntary return of an MNC  
        E.4     Criteria for cancellation of extra-territorial use              
        E.5     Cancellation procedures         
Annex F – Illustration of uses of ITU-T E.212 resources    
        F.1 Introduction 
        F.2 Mobile networks (PLMN)        
        F.3 Fixed networks (PSTN)             
        F.4 Satellite and non-terrestrial networks
        F.5 Universal personal telecommunication (UPT) 
        F.6 Services used globally
        F.7 Networks       
Annex G – Assignment of shared ITU-T E.212 mobile country codes (MCC) for trials    
        G.1     Introduction
        G.2     Scope             
        G.3     General         
        G.4     Criteria for the temporary assignment of a trial MCC+Trial-MNC           
        G.5     Procedures for temporary assignment             
Annex H – Criteria and procedures for the assignment and reclamation of shared ITU-T E.212 mobile country codes (MCC) for regional and other international organizations (ROIO)/standards development organization (SDO)-specified networks and their respective mobile network codes (MNCs)    
        H.1     Introduction
        H.2     Scope             
        H.3     Principles for assignment       
        H.4     Criteria for assignment            
        H.5     Assignment  
        H.6     Voluntary return of unused MNCs      
        H.7     Criteria for reclamation           
        H.8     Reclamation 
        H.9     Reconsideration process        
Appendix I – Form A: Notification of the use of an MCC/MNC extra-territorially    
Appendix II – Form B: Notification of the cancellation of use of an MCC/MNC  extra-territorially    
Appendix III – Shared ITU-T E.212 mobile country code (MCC) 999 for internal use within a private network    
      III.1     Introduction  
      III.2     Principles        
Bibliography