IMEI checksum validator

Client

IMEI checksum validator is synonym phrasing for Luhn check digit validation. Paste IMEI digits for immediate checksum pass/fail—no carrier or GSMA API.

Checksum vs encryption

IMEI checksum detects single-digit errors—it is not encryption and does not hide device identity from anyone who has the full IMEI string.

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.
?

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 checksum validator before API payloads with Luhn gates.
  • Unit-test reference for checksum implementations.
  • Support playbooks for portal checksum error messages.

Common mistakes to avoid

  • Calling IMEI checksum a hash

    Luhn is checksum—not SHA or MD5; do not hash IMEI for this check.

  • Checksum pass assumed unique device

    Valid format does not guarantee global uniqueness in your CSV.

  • Validating checksum on truncated exports

    Excel may drop leading zeros—paste from source of truth.

FAQ

What checksum does IMEI use?

Luhn mod-10 check digit as the 15th digit on standard GSM IMEI.

Checksum validator vs calculator?

Validator checks full string; calculator suggests missing 15th digit from 14-digit body.

Works on bulk paste?

Yes—one IMEI per line for per-row checksum results.

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.