ICCID checker (no upload)

Client

ICCID checker no upload addresses security reviews that forbid CSV attachments to third-party sites. Copy-paste only—batch lines supported—checksum math stays in your tab.

Paste-only workflow

Export ICCID column from Excel as values, copy, paste below. Review per-row Luhn before any system import.

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

  • Satisfy no-upload policies in telecom logistics RFPs.
  • Validate air-gapped-adjacent desktops that allow HTTPS tools only.
  • Replace legacy applets that required file pickers.

Common mistakes to avoid

  • Using screenshot OCR instead of paste when possible

    Direct copy from settings or CSV reduces OCR errors.

  • Pasting entire CSV with commas on one line

    One ICCID per line for batch mode—split columns first.

  • Sharing prefilled URLs in public forums

    Prefill embeds digits—keep links private.

FAQ

Do I need to upload a CSV?

No—copy the ICCID column and paste one serial per line.

Are digits logged on the server?

No—for Luhn evaluation they stay in your browser.

Can I still batch check?

Yes—multi-line paste without file upload.

Common search terms

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

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More tools

Related utilities you can open in another tab—mostly client-side.