ICCID vs MSISDN

Client

ICCID vs MSISDN: MSISDN is the dialable phone number (E.164); ICCID is the SIM serial. Support tickets often mix them—keep fields separate.

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

  • Clarify identifier roles before CSV mapping.
  • Confirm iccid vs msisdn expectations before trusting inventory or activation CSV rows.
  • Paste digits locally—no carrier or GSMA directory lookup.

Common mistakes to avoid

  • Treating format pass as live service status

    Luhn and MII hints do not prove activation, billing, or HLR state.

  • Pasting IMSI into an ICCID validation column.

FAQ

Can I derive MSISDN from ICCID?

Not from public checksum math—carrier assignment maps are private.

Is my ICCID sent to Toolcore?

No—all checks run in your browser tab only.

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.