ICCID Check Digit Calculator

How ICCID Check Digit Calculator Works?

The ICCID Check Digit Calculator applies Luhn to the first 18 or 19 digits. It appends the result as the final check digit. ICCID means Integrated Circuit Card Identifier.

1. 1Enter the ICCID payload starting with the industry code 89.
2. 2Double every second digit starting from the rightmost payload digit.
3. 3Reduce doubled values above 9 by 9 (16 → 7).
4. 4Total the ICCID digits and take (10 − (S mod 10)) mod 10.
5. 5Append the check digit to complete the 19- or 20-digit ICCID.

ICCID Check Digit Calculator Formula

The ICCID formula is Check = Luhn(payload), as defined by ITU-T E.118.

ICCID = 89 ‖ CC ‖ IssuerID ‖ Account ‖ Luhn check digit

• 89 is the telecom industry identifier.
• CC is the 1–3 digit country calling code.

Luhn sum = 60
Check = 0
ICCID = 89014103211118510720

ICCID Check Digit Calculator Conversion Table

The ICCID conversion table lists sample SIM payloads by country code with their Luhn check digit.

What is ICCID Check Digit Calculator?

An ICCID Check Digit Calculator is a tool that computes the Luhn check digit at the end of a SIM card serial number. ICCIDs are 19 or 20 digits long and are printed on the SIM card body.

Physical SIMs and eSIM profiles both carry an ICCID. The check digit lets activation systems reject mistyped numbers before contacting the carrier.

What are the uses of ICCID Check Digit Calculator?

There are 3 main uses of the ICCID Check Digit Calculator, including SIM activation, IoT fleet management, and inventory control.

• SIM activation: Retail staff verify ICCIDs on activation forms.
• IoT fleet management: Operators validate ICCIDs for thousands of connected devices.
• Inventory control: Distributors check ICCIDs in SIM stock records.