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IMSI
As far as I can ascertain, IMSI address space is 10¹⁰ per mobile network, ICCID is up to 10¹⁴ per country
IMSI
As far as I can ascertain, IMSI address space is 10¹⁰ per mobile network, ICCID is up to 10¹⁴ per country
is an equipment identifier, not a subscriber identifier. SIM serial numbers are longer than phone numbers, so there's that.