ICCID mod 10 checker

Client

ICCID mod 10 checker names the Luhn algorithm explicitly for engineers comparing telecom serials to payment-card validators. Paste the full digit string—including check digit—and read pass/fail plus suggested trailing digit fixes.

Mod 10 on full serial

Include the trailing check digit. Spaces and dashes are stripped. If mod 10 fails, compare the suggested digit against the physical card before accepting OCR output.

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

  • Explain mod-10 failures to developers integrating SIM inventory APIs.
  • Cross-check hand-written Luhn implementations against known ICCID samples.
  • Debug warehouse scans where the last digit is smudged.

Common mistakes to avoid

  • Running mod 10 on issuer block without check digit

    Luhn applies to the full ICCID string as printed.

  • Assuming mod 10 equals ISO 7064

    ICCID uses Luhn (mod 10)—not every telecom ID does.

  • Using mod 10 pass as proof of issuer identity

    MII 89 is a hint— not a carrier name lookup.

FAQ

What is mod 10 for ICCID?

Luhn checksum—double every second digit from the right, sum, mod 10 equals zero for valid strings.

Is mod 10 the same as Luhn?

Yes—in this context they refer to the same check.

Can I test with the generic Luhn tool?

Yes—this page adds ICCID-specific length and MII readout.

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Phrases people search for that match this tool. See the full long-tail keyword index.

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