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What is ICCID?

ICCID (Integrated Circuit Card Identifier) - A SIM card contains its unique serial number (ICCID). ICCIDs are stored in the SIM cards and are also printed on the SIM card during a personalisation process. The ICCID is defined by the ITU-T recommendation E.118 as the Primary Account Number. A full ICCID is 19 or 20 characters.

What is ICCID

Sometimes it happens that on the SIM card is printed only the last 13 digits of ICCID number. On this basis, the network operator is able to identify the card while online checker may show incorrect check results.

ICCID on sim card

The format of the ICCID is: MMCC IINN NNNN NNNN NN C x
MM = Constant (ISO 7812 Major Industry Identifier)
CC = Country Code
II= Issuer Identifier
N{12} = Account ID ("SIM number")
C = Checksum calculated from the other 19 digits using the Luhn algorithm.
x= An extra 20th digit is returned by the 'AT!ICCID?' command, but it is not officially part of the ICCID.