From a 20-digit ICCID, identify the issuer identifier number.

From a 20-digit ICCID, identify the issuer identifier number.

• A. 89
• B. 44
• C. 245252
• D. 001451548

Answer: (C)

An ICCID is structured with the Major Industry Identifier first, which signals the type of issuer, followed by the Issuer Identification Number that identifies the telecom operator, and then the individual account identifier. In a 20-digit ICCID, the first two digits show the MII (here 89, indicating telecommunications). The block that immediately follows—the issuer’s identification—identifies the specific operator. Here that issuer-identifying block is 245252, which is the number that designates the issuer. The remaining digits are the subscriber’s unique account within that issuer. So 245252 is the issuer identifier number.

An ICCID is structured with the Major Industry Identifier first, which signals the type of issuer, followed by the Issuer Identification Number that identifies the telecom operator, and then the individual account identifier. In a 20-digit ICCID, the first two digits show the MII (here 89, indicating telecommunications). The block that immediately follows—the issuer’s identification—identifies the specific operator. Here that issuer-identifying block is 245252, which is the number that designates the issuer. The remaining digits are the subscriber’s unique account within that issuer. So 245252 is the issuer identifier number.