IMEI blacklist format check

Client

Blacklist searches are high-intent but often mixed with format checks. This page validates IMEI structure locally and clearly states we do not return blacklist, blocklist, or lost/stolen registry status.

Format vs blacklist status

A valid Luhn IMEI can still be blocklisted. An invalid IMEI will fail carrier portals anyway—fix format first, then run authorized status checks.

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

  • Pre-validate IMEI digits before calling carrier fraud departments.
  • Clean CSV IMEI columns in resale pipelines—format gate only.
  • Document honest scope in internal compliance training.

Common mistakes to avoid

  • Treating format check as blacklist clear

    Only carrier/OEM authorized tools report blocklist state.

  • Uploading customer IMEIs to unverified blacklist websites

    Prefer local format tools when lists are sensitive.

  • Skipping carrier verify after Luhn pass on used phones

    Resale due diligence needs carrier blacklist when available.

FAQ

Is my IMEI blacklisted?

This page cannot answer—contact your carrier or use their official check tools.

What does blacklist format check mean?

We validate the IMEI string shape before you run separate blacklist steps elsewhere.

Why offer this page?

Catch invalid digits early—separate from live registry queries we do not perform.

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.