ICCID check

Client

An ICCID check confirms the printed SIM or eSIM profile serial satisfies the public Luhn checksum used in E.118-style layouts—before you import rows into inventory or compare card photos. Paste below; nothing leaves your browser.

How to run an ICCID check

Copy digits from the SIM card, eSIM label, or CSV. Paste into the field—spaces and dashes are stripped. Read Luhn pass/fail, MII prefix, and suggested check digit if the last digit looks transposed.

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

  • Answer the core search intent: does this ICCID pass Luhn after digit cleanup?
  • Batch-paste shipment CSV lines and scan pass/fail per row.
  • Pair with IMEI check when auditing handset plus SIM paperwork.

Common mistakes to avoid

  • Assuming check means the SIM is active

    Format math only—no provisioning or HLR query.

  • Mixing ICCID with IMSI or MSISDN fields

    Keep SIM serial separate from subscriber directory numbers.

  • Rejecting valid rows because MII is not 89

    89 is the usual telecom prefix—other MII values may still Luhn-valid for lab data.

FAQ

What is an ICCID check?

Digit cleanup plus Luhn mod-10 on the full string, with MII and issuer-block readout—no live carrier API.

How many digits should I paste?

Typically 18–22 digits after removing spaces; issuers standardize one length per range.

Does ICCID check activate a SIM?

No. This page never calls operator provisioning systems.

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.