ICCID before carrier activation

Client

ICCID before carrier activation catches typos early—before you spend time in a portal that rejects bad checksums or queues a failed provision attempt. This page validates format only; it does not activate lines or call carrier APIs.

Portal prep checklist

Strip spaces, confirm 18–22 digits, read Luhn pass/fail, note MII 89 when present, then paste into the carrier portal. Keep IMSI and account email 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

  • Pre-check serials before MVNO self-serve activation wizards.
  • Reduce failed activations caused by transposed digits on manual entry.
  • Document a support step: Luhn pass required before portal paste.

Common mistakes to avoid

  • Skipping validation because the card looks genuine

    Printing quality does not guarantee correct manual retyping.

  • Using activation portal error messages as Luhn tools

    Portals vary—local mod-10 is faster for bulk prep.

  • Believing pre-check reserves or activates the SIM

    No network side effects from this browser-only page.

FAQ

Should I check ICCID before every activation?

Recommended for manual entry; optional when scanner output is trusted.

Will carriers see my pre-check?

No—validation runs entirely in your browser.

What if Luhn passes but activation still fails?

Carrier systems may reject for inventory, finance, or profile reasons unrelated to checksum.

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.