GSMA IMEI format check

Client

GSMA IMEI format check matches searches about standard handset identifier layout. We validate structure per common GSMA IMEI conventions locally—this is not a live GSMA IMEI Database or registration lookup.

Format vs database lookup

GSMA maintains allocation databases in the industry—this page validates digit structure only. For live registry questions, use authorized carrier or law-enforcement channels.

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

  • QA imported handsets against expected 15-digit layout.
  • Document GSMA format expectations in compliance runbooks.
  • Pre-check digits before typing into carrier portals.

Common mistakes to avoid

  • Expecting GSMA format check to query the IMEI DB

    No live GSMA registration or blacklist API on this page.

  • Assuming GSMA pass means homologation approved

    Regulatory approval is separate from checksum validation.

  • Using 16-digit IMEISV rules for standard IMEI forms

    Match field length to form requirements.

FAQ

What is GSMA IMEI format?

Industry layout: TAC + serial + Luhn check digit on 15 decimal digits for standard IMEI.

Is this an official GSMA tool?

No—Toolcore runs local format math; not affiliated with GSMA database services.

Does format check prove authenticity?

No—counterfeit devices can pass Luhn; use OEM/carrier channels for authenticity.

Common search terms

Phrases people search for that match this tool. See the full long-tail keyword index.

  • imei checker online validate luhn
  • gsm imei check digit calculator browser
  • imeisv split tac serial software version
  • 15 digit imei validity check local
  • calculate imei check digit from 14 digits
  • free imei checker online
  • validate imei number online
  • imei luhn check browser
  • android imei check format
  • iphone imei validator local

More tools

Related utilities you can open in another tab—mostly client-side.