IMEI TAC format

Client

IMEI TAC format pages explain the first 8 digits (Type Allocation Code) and following serial segment after Luhn passes. This page splits structure locally—it does not query a live GSMA TAC manufacturer database.

TAC segment layout

Standard 15-digit IMEI: TAC (8) + serial (6) + Luhn check digit (1). IMEISV extends with software version—use imei-vs-imeisv when parsing 16-digit fields.

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

  • Teach logistics teams how TAC prefixes group handset batches.
  • Compare TAC across two pasted IMEIs for duplicate-batch detection.
  • Document expected TAC prefix in QA runbooks (manual reference).

Common mistakes to avoid

  • Treating TAC split as live model lookup

    We show digit groups—not guaranteed brand/model from GSMA DB.

  • Reading TAC before Luhn passes

    Fix checksum errors first—segments assume a valid 15-digit layout.

  • Using TAC alone as proof of counterfeit

    Counterfeit assessment needs OEM/carrier channels beyond format.

FAQ

What is IMEI TAC?

Type Allocation Code—typically the first 8 digits identifying type allocation in GSMA layout.

Does TAC format show phone brand?

Not live—segment readout only; brand tables require separate GSMA resources.

TAC same for all colors of a model?

Often shared within a type allocation batch—OEM assigns TAC blocks.

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.