3gpp UE Identities IMSI # MSISDN # External Identifier # IP address # IoT # 5G # 6G IMSI # (15 Digits/ E.164/ ) The IMSI number is subscriber identification with given operator/ network (PLMN) with a maximum length of 15 digits. The IMSI is consists of an MCC (Mobile Country Code), an MNC (Mobile Network Code), and an MSIN (Mobile Subscriber Identity) formation IMSI (15) = MCC (3) + MNC (2-3) + MSIN (9-10) format - TBCD format MSISDN format (15 digits/ E.164/ TBCD Format) The ITU-T recommendation E.164 limits the maximum length of an MSISDN to 15 digits. wherein 1-3 digits are reserved for country code. Prefixes are not included (e.g., 00 prefixes an international MSISDN when dialing from Sweden). http://www.3gpp.org/wiki/index.php?title=Current%20Capacity%20of%20IMSI%2C%20MSISDN%2C%20and%20IPv6%20Identifiers https://www.linkedin.com/pulse/mobile-numbering-basics-explained-imsi-vs-msisdn-atte-miettinen/ From 3GPP TS 23.003: IMSI : No more than 15 digits. Is compose...
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