Prepaid SIM ICCID check

Client

Prepaid SIM ICCID check applies the same E.118 Luhn rules to retail kits where the serial is printed under a barcode on the card holder. Confirm digits before typing into a point-of-sale or self-serve activation flow—locally, without querying the carrier.

Retail prepaid vs postpaid serials

Issuer length profiles differ, but the public checksum approach is the same. Paste the full decimal string including the trailing check digit—spaces and dashes are stripped automatically.

Privacy: digits are evaluated only inside your browser. There is no carrier, GSMA, or SM-DP+ query—format math only. Treat SIM identifiers like any sensitive operational paste.
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The ITU‑T E.118 layout follows ISO/IEC 7812 for card identifiers: a Major Industry Identifier (telecom ICCIDs usually start with 89), an issuer/country/account block, then a trailing Luhn mod‑10 check digit using the same doubling rule as many payment PAN validators. Printed cards commonly show 18–22 digits; issuers pin one length profile per range.

Result

Passes Luhn mod 10 on the full 19-digit string.

  • MII (first 2): 89
  • Issuer / account core (between MII and check): 3530012345678901
  • Check digit (last): 1

Common use cases

  • Verify ICCID on prepaid starter kits before handing them to customers.
  • Catch OCR or manual entry errors when scanning barcodes at retail counters.
  • Audit prepaid shipment CSVs where ICCID sits beside SKU and MSISDN placeholder fields.

Common mistakes to avoid

  • Confusing activation code with ICCID

    Some kits print separate PIN or voucher codes—confirm the ICCID label.

  • Using ICCID check to confirm account balance

    Luhn pass does not reveal minutes, data, or expiry.

  • Mixing prepaid ICCID with postpaid IMEI audits

    Handset IMEI and SIM ICCID answer different inventory questions.

FAQ

Where is ICCID on a prepaid SIM?

Usually on the card body under the barcode—often 19–20 digits starting with 89.

Does prepaid ICCID use the same Luhn rule?

Yes—same mod-10 checksum family as postpaid and eSIM profiles.

Will this activate my prepaid SIM?

No—format validation only; activation stays in your carrier workflow.

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