ICCID IMSI field compare

Client

ICCID IMSI field compare helps teams stop swapping SIM serial and subscriber identity in CSV imports. Paste ICCID below for Luhn—IMSI validation uses different rules and is not processed as ICCID here.

Two-column discipline

Provisioning files often list ICCID and IMSI adjacent. Validate ICCID with Luhn on this page; treat IMSI as a separate field with its own validation path in your ETL.

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

  • ICCID IMSI field compare training for MVNO onboarding staff.
  • Fix mixed columns in legacy OSS exports before ETL.
  • Support tickets where portal rejected mistyped SIM serial.

Common mistakes to avoid

  • Pasting IMSI into ICCID validation column

    IMSI length and layout differ—keep fields separate.

  • Expecting compare page to map ICCID to IMSI

    No carrier assignment directory—format validation on ICCID only.

  • Using IMSI from invoice where ICCID is labeled

    Confirm label says ICCID or SIM serial on card print.

FAQ

What is the difference between ICCID and IMSI?

ICCID is SIM card serial on plastic or profile; IMSI is subscriber identity on the network.

Can I derive IMSI from ICCID here?

No—public checksum math does not reveal private carrier mappings.

Which do I validate for logistics?

Usually ICCID on SIM shipment manifests—follow your template.

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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.