IMEI structure check

Client

IMEI structure check is for engineers and ops teams who need segment boundaries spelled out. Paste digits to classify IMEI vs IMEISV and read TAC/serial/check fields—no external registry.

Structure vs status

Structure check confirms the string looks like a valid IMEI layout. Activation, blacklist, and warranty status require other systems—not inferred from format alone.

Privacy: digits are parsed only in your browser—no carrier or GSMA lookup, no upload. Treat device identifiers like any sensitive paste on shared machines.
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A 15-digit IMEI is commonly described as eight-digit TAC + six-digit serial + Luhn check digit; the trailing digit should satisfy ISO/IEC 7812 mod 10 on the full string—same arithmetic as debit/credit PAN checks. A 16-digit IMEISVappends two software version digits instead of exposing the standalone check position; carriers may still relate it to IMEI numbering but this page stops at segmentation and does not certify assignment.

Result

Passes Luhn mod 10 on the 15-digit string.

  • TAC (8): 35693803
  • Serial (6): 564380
  • Check (1): 9

Common use cases

  • IMEI structure check before writing internal parsing code.
  • Audit CSV columns that mix IMEI and IMEISV in one field.
  • Documentation screenshots for telecom onboarding guides.

Common mistakes to avoid

  • Assuming structure check validates country of sale

    Layout is global—regional policy is separate from format.

  • Stripping leading zeros from TAC segment

    IMEI is decimal string—preserve leading digits from source.

  • Expecting structure check to return SIM profile

    ICCID and IMEI are different identifier families.

FAQ

What does IMEI structure include?

TAC, serial, and Luhn check digit on 15-digit GSM IMEI; IMEISV adds software version field.

Does structure check upload data?

No—processing stays in your browser tab.

Can structure check fix bad CSV?

It flags bad rows—you clean upstream in your spreadsheet or ETL.

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.